Inspiration by Seasonality

There’s something magical about late spring strawberries and fresh summertime corn: flavor! It’s no secret that cooking with fresh ingredients brings great flavors to foods. Limiting your shopping list to in-season items is a fun way to challenge yourself, and because in-season ingredients tend to pack more of a flavor punch, it’s easier to make your cooking taste amazing. There’s another perk of using in-season ingredients: they’re generally priced lower, based on the laws of supply and demand. Grocery stores have to figure out how to sell all those zucchinis when they come up for harvest!

Next time you’re at the grocery store, take note of what new fruits and vegetables have arrived and what is in dwindling supply. Corn on the cob is one of the most seasonal items where I live, nearly impossible to get out of season. Other produce, like peaches, is available in my local store almost year-round, but rarely delights and usually disappoints. Try this cooking challenge for inspiration: treat any food that’s outside its growing season as off-limits. Peach pie in April? Out. Even if you can get a peach in April, it won’t have the same flavor as a mid-summer peach, so your pie will invariably taste bland.

Of course, not every item is a seasonal one. Cellar onions, storage apples, and pantry goods such as rice, flour, and beans are year-round staples. If it’s the dead of winter and there’s a foot of snow on the ground (incidentally, not the best time to eat out at restaurants specializing in local, organic fare), finding fresh produce with good flavor can be a real challenge. There’s a reason winter meals in cold climates lean heavily on cooking techniques to produce flavors. Classic French winter dishes like cassoulet (traditionally made with beans and slow-cooked meats) and coq au vin (stewed chicken in wine) use cellar vegetables and meats from domesticated animals. But come summertime? A quickly sautéed fish with fresh greens is amazing. I can’t imagine eating a heavy, rich cassoulet in the middle of summer, yet in the dead of winter, nothing’s better.

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Where people live and the time of year change what they eat: Google Trends data shows search volumes for the terms “peach” (top) and “tomato” (bottom) for California users and Massachusetts users. The growing season in Massachusetts starts later and is much shorter than in California.

We’re lucky to live in a time with an amazing food supply. Many cuisines are defined by seasonality and the history of the associated region’s food environment. The 19th century French favored dishes like cassoulet and coq au vin based on their food supply. Cuisines in costal parts of the Scandinavian region were constrained by the lack of a road system until only a few decades ago, so it’s no surprise that modern Nordic cuisine incorporates simple cheeses and preservation methods like cured fish while shying away from complex spices.

On the downside, our modern food supply means we’re no longer constrained by seasonal ingredients, which makes it harder to learn how to cook well. Shopping at a farmers’ market can be a great source for seasonal inspiration and flavorful ingredients that will inspire. Consider the seasonal soups on pages 116–118. Buying butternut squash in July is almost impossible, and I wouldn’t make gazpacho in winter. Same thing for seasonal salads. A summer salad with mozzarella, tomatoes, and basil (see page 114)? Yum. A wintertime salad with fennel? A fall harvest salad with toasted pumpkin seeds and sprouted seeds? (Guess who’s hungry now, as I write this!) Understanding flavors from the perspective of the seasons can be as easy as strolling through the produce aisle and conjuring the inspiration by exploration covered in the prior section, if you keep your eyes open to the possibilities.

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Seasonality chart for fruits and vegetables in New England. Fruits have a shorter season than vegetables, and only a few vegetables survive past the first frost. Some plants can’t tolerate the hottest part of the year; others do best during those times.

Fresh Basil, Tomato, and Mozzarella Salad

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Fresh basil and tomato are best at the peak of summertime because the compounds that give them great flavor require warm weather. Try this classic combination when you’re able to get good tomatoes. (And if you’re adventurous, make your own mozzarella cheese; see page 433.)

Toss in a bowl and serve:

1

cup (180g) sliced tomatoes, about 2 medium ones

1

cup (15g) fresh basil leaves, from about 3 or 4 stems

½

cup (100g) mozzarella

1

tablespoon (15 mL) olive oil

1

teaspoon (5 mL) balsamic vinegar (or more to taste)

 

Salt and pepper to taste

Notes

There’s no wrong ratio of basil to cheese to tomato. Hold back some of each ingredient, take a look at the resulting salad, and toss in more of whatever you think will make it better. The only thing to be careful with is the salt; once there’s too much in there, it’s hard to fix.

How to slice the tomatoes and cheese is also up to you. Try thick slices of tomato and cheese, alternating in layers on the plate. Or slice the tomato and cheese into bite-size pieces to be served in a bowl.

Try making this twice, once with conventional breeds of tomatoes and a second time with heirloom tomatoes, to see the difference it makes.

Fennel, Portobello Mushroom, and Parmesan Salad

Fennel bulb, also known as Florence fennel, is a cool-weather item, typically harvested in fall or early winter, before any serious winter weather. This simple salad is a great combination of flavors. Make sure to slice everything as thinly as possible and to use high-quality Parmesan cheese and balsamic vinegar.

Toss in a bowl:

1

small fennel bulb (100g), sliced thinly

½

medium Portobello mushroom (60g), sliced thinly

2

ounces (60g) of Parmesan cheese sliced into wide, thin shavings

2

tablespoons (30 mL) olive oil

Serve by transferring a handful of the mix onto a plate. Drizzle a small amount of balsamic vinegar on top and optionally sprinkle with pomegranate seeds or toasted pumpkin seeds.

Note

The best way to separate the seeds out of a pomegranate fruit is under water in a bowl. Slice the fruit in half, drop the halves into a large bowl full of water, and then use your fingers to break open the various compartments and separate the seeds. The fruit’s white, inedible, fleshy part (called the mesocarp) will float, while the seeds will sink.

Springtime Lettuce Soup

Lettuce soup was a surprise for me, especially as I’ve never seen it while eating out. Lettuce soup has a succulent taste similar to broccoli soup and is somewhat reminiscent of Vichyssoise, a potato, leek, and onion soup. If you’ve ever had a CSA share (see page 124) and ended up with 8 heads of lettuce at the beginning of spring, this soup is a great use for them.

In a large saucepan over medium heat, melt 2 tablespoons (30g) butter or olive oil. Add:

1

medium (100g) onion, diced

1

medium (150g) potato, diced

½

teaspoon (3g) salt

Sauté the onion and potato for 5–10 minutes. Add:

4

cups (~1 liter) chicken or vegetable stock

2

cloves (5–10g) garlic, diced

½

teaspoon (1g) freshly ground black pepper

Bring to a simmer and then add:

1

head (400g) lettuce, leaves torn or cut into large strips

You can use other greens—arugula, pea shoots, spinach—based on what you have on hand. Stir the greens in, cooking a few minutes until they’re tender. For a creamier soup, add 1 cup (240 mL) whole milk or ½ cup (120 mL) cream.

Remove the saucepan from the heat and allow it to cool for a few minutes. Purée the soup either by using an immersion blender or by transferring it to a blender and processing it in batches. Add salt and pepper to taste, and optionally add other spices, such as coriander or nutmeg. Serve either warm (try sprinkling a cheese like cheddar on top) or chilled (top with a spoonful or two of sour cream and fresh chives).

Winter White Bean and Garlic Soup

In a bowl, soak for several hours or overnight:

2

cups (400g) dry white beans, such as cannellini beans

After soaking them, drain the beans, place them in a pot, and fill it with water (try adding a few bay leaves or a sprig of rosemary). Bring the water to a boil and simmer the beans for at least 15 minutes. Strain out the water and put the beans back in a pot (if using an immersion blender) or in the bowl of a food processor.

Add to the pot or bowl with the beans and then purée until blended:

2

cups (480 mL) chicken or vegetable stock

1

medium (100g) yellow onion, diced and sautéed

3

slices (50g) French bread, coated in olive oil and toasted on both sides

½

head (25g) garlic, peeled, crushed, and sautéed or roasted

 

Salt and pepper, to taste

Notes

Don’t skip boiling the beans. Really. One type of protein present in beans—phytohaemagglutinin—causes extreme intestinal distress. The beans need to be boiled to denature this protein; cooking them at lower temperatures (e.g., in a slow cooker) will not denature the protein and actually makes things worse. If you’re in a rush, use canned white beans; they’ll have already been cooked.

Variations: try blending some fresh oregano into the soup. Toss some bacon chunks on top or grate on some Parmesan cheese as well. As with many soups, how chunky versus how creamy to blend the soup is a personal preference.

Summertime Gazpacho Soup

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Gazpacho is a Spanish treasure chest of tomatoes and raw vegetables, blended together and served cold—perfect for warm summertime meals. There’s really no wrong combination of ingredients, as long as they’re all full of flavor.

Purée, using an immersion blender or food processor:

2

large (500g) tomatoes, peeled, with seeds removed

Transfer the puréed tomato to a large bowl. Add:

1

(150g) cucumber, peeled and seeded

1

cob (125g) corn, grilled or broiled and cut off the cob

1

(100g) red bell pepper, grilled or broiled

½

small (30g) red onion, thinly sliced, soaked in water, and drained

2

tablespoons (30 mL) olive oil

2

cloves (5–10g) garlic, minced or pressed through a garlic press

1

teaspoon (5 mL) white wine vinegar or champagne vinegar

½

teaspoon (3g) salt

Stir to combine. Adjust salt to taste and add ground black pepper as desired.

Notes

The weights in this recipe are for the prepared ingredients (i.e., after removing seeds, trimming stems, or soaking).

If you prefer a smooth gazpacho, purée all of the ingredients at the end. Or add a portion of the veggies, purée, and then add the remainder to achieve a partly smooth, partly chunky texture. It’s all about your preference!

Gazpacho is a dish that relies on fresh ingredients that invariably have differences in flavor. There’s no mechanical or chemical reason for these quantities to be written as they are, so add more of this, less of that; whatever you like to suit your tastes. Try expanding this recipe to include other ingredients such as hot peppers or fresh herbs.

Grilling or broiling the corn and bell pepper adds a smoked flavor to the soup, due to the chemical reactions that take place at higher heat, as we’ll discuss later in this book. You might find you prefer a “raw” version of this soup. Or, if you really like the smoky flavor, try adding some liquid smoke (see page 403) to amp it up.

Whenever you see a recipe calling for a grilled vegetable, you should default to rubbing it with a light coating of olive oil before grilling it; this will prevent the vegetable from drying out while cooking.

How to Peel a Tomato

I have a friend whose boyfriend tried to make her a surprise dinner involving tomato soup, but he didn’t know how to peel tomatoes. She came home to find her guy frantically trying to use a vegetable peeler on the tomatoes, to no avail...

To peel tomatoes, drop them in boiling water for 15–30 seconds, pull them out with tongs or a mesh spider, and then just pull the skins off. You can cut an “x” shape into the skin before blanching the tomatoes, although I find the skin on some varieties will pull back regardless, as long as the water is at a full rolling boil. Experiment to see if it makes a difference!

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Fall Butternut Squash Soup

Fall, with its harvest and bounty of squash and gourds, is my favorite time of year for seasonal cooking. Treat this recipe as a starting template and add seasoning and other produce as garnish.

Purée in a food processor or with an immersion blender:

2

cups (~600g) butternut squash, peeled, cubed, and roasted (about 1 medium squash)

2

cups (480 mL) chicken, turkey, or vegetable stock

1

small (110g) yellow onion, diced and sautéed

½

teaspoon (3g) salt

Notes

As with the gazpacho recipe, the weights are for the prepared ingredients and only rough suggestions. So, prepare each item individually. For the squash, peel and cube it, then coat it with olive oil, sprinkle it with salt, and roast it in the oven at a temperature around 400–425°F / 200–220°C until it begins to brown. When you go to purée the ingredients, hold back some of the squash and some of the stock, taste the purée, and see which you think it needs. Want it thicker? Add more squash. Thinner? Add more stock.

This soup by itself is very basic. Garnish it with whatever else you have on hand that you think might go well, such as garlic croutons and bacon. Or top it with a small dab of cream, some toasted walnuts, and dried cranberries to give it a feeling of Thanksgiving. How about a teaspoon of maple syrup, a few thin slices of beef, and some fresh oregano? Chives, sour cream, and cheddar cheese? Why not! Instead of purchasing items to follow a recipe exactly, try using leftover ingredients from other meals to complement the squash soup.

If you’re in a rush, you can “jump-start” the squash by microwaving it first. Peel and quarter the squash, using a spoon to scoop out the seeds. Then, cube the squash into 1–2” / 3–5 cm pieces, drop it into a glass baking pan that’s both oven and microwave safe, and nuke it for 4–5 minutes to partially heat the mass. Remove the squash from the microwave, coat it with olive oil and a light sprinkling of salt, and roast it in a preheated oven until done, about 20–30 minutes. If you’re not in a rush, you can skip the peeling step entirely: cut the squash in half; scoop out the seeds; add oil and salt; roast it for about an hour, cut side down, cooking it until the flesh is soft; and use a spoon to scoop it out.

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To cut thick gourds such as squash and pumpkins, use a large chef’s knife and a mallet. First, slice off a thin piece of the gourd so that it lies flat and doesn’t roll, then gently tap the knife blade through the gourd.

Tim Wiechmann and Linda Anctil on Seasonal Inspiration

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Tim Wiechmann is the chef and owner of T.W. Food in Massachusetts.

How do you go about planning a dish?

I start with the ingredients—they all have to be in season. I came up with a dish that was made with leftover cheese from the Pyrénées. Black cherries and beets are in season, so how can I dress up a beet salad? In the Pyrénées, they have cherries with sheep’s milk cheese. Most of my stuff comes from cultural things, from traveling all over and having a sound grasp on food in Europe. I study what people make from all over—they do this here, they do that there. And these things are done for thousands of years. I try to have a knowledge of these things and then I just look at my own ingredients here, and I draw them together.

My menu is actually really difficult. Everything goes through a rigorous, precise set of cooking parameters. With certain preparations, time and temperature are everything. Observation is critical, as is getting experience in knowing what looks good. If you’re cooking an onion, it changes color over time. There are certain stages where you want to pull it because the bitterness increases as the caramelization increases. Onions in a tall pot will sweat differently than onions in wide pot. In a tall pot, they release their own water and cook evenly because the water doesn’t disappear. We have specific pots that are good for certain things—sweat the onions in this pot; don’t use that pot—but a new cook will just grab any pot.

How do you know if something is going to work?

You just try. When you start to play the piano, you don’t know where the notes are. You have to have the technique, then you can think about putting the notes together. If I hit this note, then I’ll get this sound; if I want onions to be sweet, I’ll caramelize them. The technique follows the knowledge. I keep a log of my own recipes and times for each thing. How long to put cherries or apples in a bag and cook in the water circulator—that comes out of experience.

My big thing I always say: “Get into it and go for it.” Every time you cook something—even if you burn it and it goes in the trash—it’s not a failure, it’s just: next time I’m not going to burn it.

For Tim’s roasted beet salad recipe, see http://cookingforgeeks.com/book/beetsalad/.

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Linda Anctil is a private chef in Connecticut.

How do you think about the visual experience of food?

I approach food as a designer, but because it is food, it also has to function. Ultimately, it has to taste good. Sometimes, I’m inspired by an ingredient, a season, a shape, or a color, but inspiration can come from anywhere. I always try to include an element of surprise, whether it’s visual or stimulating to other senses.

Nature is a constant source of inspiration to me. I went out to the garden to pick some sage last winter, and I had the scent of conifers from my Christmas tree on my gloves. The smells became intermingled in my mind and, suddenly, conifers became something I could use as an herb. It inspired a whole series of dishes that I put together using the flavor of conifer. I did one where I layered lots of different textures and flavors together, culminating with my video “The Winter Garden.” I think it was probably my most abstract or conceptual dish that I’ve put together, but it really captured that whole feeling of being outside on that one day with the ice and the snow and the frost and the smell of conifers. I was the only one who ate the dish in the end. I enjoyed it a lot. It was a very personal expression to me.

Do you have any suggestions about how to think about presenting food?

Keep an open mind. Pick up a piece of fruit and imagine that you were an alien on this planet who had never seen it before, and experience it through that lens. How does it look to you? What does it smell like? What does it taste like? What can you do with it? Think outside of the box and enjoy the journey! You can look at any artist or chef’s food, and you’ll realize it’s a personal expression of who they are. It’s telling a story about that person’s experiences. That’s a wonderful aspect of cooking.

To watch one of Linda’s videos, see http://cookingforgeeks.com/book/winterdish/.

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PHOTOS OF LINDA ANCTIL AND WINTER GARDEN PROJECT USED BY PERMISSION OF LINDA ANCTIL.

“Below legally allowed levels” doesn’t mean “100% guaranteed,” regardless of whether you’re buying organic or conventional. In the US, the FDA inspects less than 1% of imports (as of 2012), and excess pesticide residues have been found in some foods imported from abroad when tested by independent researchers. Enforcement (and funding for it) needs to be stepped up.

Computational Flavor Inspiration

Computer, what goes well with Tea, Earl Grey, Hot?

Technology isn’t that far away from being able to answer questions like this, and it’s exciting! Imagine opening your fridge door, seeing a few leftover ingredients from a prior night’s meal, and tapping a button on a device and saying, “Show recipes that use chicken, cilantro, and lemons.” My current high-tech watch already lets me do this!

What about more inspirational possibilities? Finding recipes that use a handful of ingredients is one thing, but what if we could computationally predict new recipes, creating combinations that had never been tried before yet delight with flavor? Thanks to a better understanding of how flavors work and having enough combined data to comb through, it’s now possible.

There are two main approaches to computational flavor inspiration: co-occurrence of ingredients and chemical similarity between ingredients. Both have their advantages and disadvantages; more recent research that combines the methods is beginning to bear fruit. Computers are really good at comparing lots of numbers, and these methods definitely benefit from that. (They’re also really good at doing exactly what they’re programmed to do, not what we necessarily meant them to do.)

First, a disclaimer: picking pleasing flavors—or at least ones that invoke an emotional response or trigger a memory—is somewhere between an art and a science. No scientific equation can capture the entire picture, and what you’re craving at any given moment will also vary. Still, understanding how “flavor compatibility algorithms” work can provide you with a way of organizing your thoughts on food, and the results can be useful for the more inquisitive, off-recipe type of cook.

Co-Occurrence of Ingredients

If items A, B, and C go together in one dish; and another dish uses B, C, and D; then there’s a decent chance that A might work in the second dish as well. These sorts of transitive relationships aren’t guaranteed to work, but they are useful enough that most good cooks use them intuitively. Say you like guacamole and know that it commonly contains avocado, garlic, onion, lime juice, and cilantro. When tossing together a salad that has similar ingredients—say, tomato, avocado slices, and onion—it’s reasonable to guess that some coarsely chopped cilantro will work well in it, and maybe even some crushed garlic in a vinegar/oil dressing.

What if we took this idea a step further by computationally examining thousands of recipes and their ingredients? A few projects and notable books have already done this, but it’s still a fun exercise. Snag a few thousand recipes (easy enough for a computer science major like myself), run them through something to clean up the data, and voilà! You’ll have a co-occurrence matrix that shows the relative probability that an ingredient shows up with another. With a few tweaks (normalizing the weights to be 0 to 1; dropping salt, which links everything together), the results become almost human readable. (See http://cookingforgeeks.com/book/cooccurrence/ for a .csv file.)

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Ingredients commonly paired with chocolate based on co-occurrence in recipes—it’s commonly used with almonds, bananas, butter, cinnamon, coconut, hot peppers, milk, walnuts, and vanilla.

For chocolate, the most common ingredient it’s paired with is vanilla (giving it a weight of 1 in the normalized co-occurrence matrix). The second most common ingredient (in my dataset) is milk (0.320). Walnuts (0.243), oil (0.166), cream (0.128), and pecans (0.121) are the next four. Hearing this list yields no surprises; chocolate is common with vanilla, dairy, and nuts. For other ingredients, it can be a boon. What spices are typically used with beef? (Black pepper, parsley, thyme, bay leaf, oregano, chili.) Or chicken? (Parsley, thyme, basil, paprika, cayenne pepper, ginger.) You could extend this by collecting different collections of recipes—how does ingredient co-occurrence change between cultures? (“Computer, adjust recipe to be Tex-Mex style.”) Or over time? Imagine the possibilities.

Data is only as useful as the ability to see and act upon it, so unless you’re a spreadsheet junkie, something more is needed to visualize the data. I’ve hacked together a simple interface for clicking through the various ingredients (see http://cookingforgeeks.com/book/foodgraph/). With time, it’ll become unusable (or go offline). There’s an expression in software, “code rot,” that describes how software becomes more buggy and less usable as the systems we use are updated and no longer 100% backward compatible. See the example image for chocolate to understand what the software looks like if you’re unable to load it.

Chemical Similarity

Many of the compounds that give ingredients their flavors can be measured and quantified—assuming you have access to lab equipment that does stuff like chromatography! Drop a sample in, separate out the compounds, and compare the results to those of known compounds. Okay, okay; this is a gross oversimplification. Maybe some day in the distant future my watch could do it, but for now it’s not easy; and even the best lab equipment is not sensitive enough to detect all the odorants our noses can smell. For this reason, I’m going to describe the concept of chemical similarity using odor descriptions instead; we’ll use our noses as the chemical detectors. It’s only one step removed from measuring the odorants directly.

One way to determine similarity is by measuring a number of different variables—say, quantities of potential compounds or odors—and then comparing items based on those different variables. It’s a two-step process: first, figure out a bunch of numbers that describe an individual item; and second, compare those numbers between different items.

This is more easily described with an example. Imagine a flavor profile for a food item, where the profile is how much the food item smells like the terms in Andrew Dravnieks’s 146-odor list (see page 94). For every term in the list, take an item of food and score it on a scale from 1 to 5, where a score of 1 indicates “doesn’t smell like it at all” and 5 is “the very definition of the word!” Given a pear, how much does it smell like a “heavy” odor? 1. Fruity? Maybe a 3? Or how about fragrant? Say it’s a ripe pear, so 4. (The full odor atlas that Dravnieks created does something similar using a collection of known chemical compounds.) This first ranking step is not asking if the food item and odor description are compatible, just if the odor label accurately describes the smell and quantifying it with a number.

The second step to similarity matching compares the values for different ingredients, based on the theory that ingredients with similar scores can be combined or substituted for each other. Given the scores for the odors you sense in a pear, and those you sense in a banana, how much overlap would there be? You can plot a graph (almost like a histogram) for the two, showing how similar they smell. Do this for a bunch of ingredients, and it’s easy to show that pear and banana have more similar odors than, say, salmon and pear.

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Results from asking a few thousand untrained users online to vote how much they thought various odor terms described bananas and pears (taller bars indicate a larger degree of agreement between food and odor).

Unlike ingredient co-occurrence, the chemical similarity method can find overlapping flavors that wouldn’t historically exist. You can imagine a graph with all the ingredients for a dish, showing all the “frequencies” present in the smells of each ingredient. Think of it like the various instruments that contribute to a piece of music: each has its own set of frequencies, and the combination of all the instruments makes up the overall song’s frequency distribution. When in tune, the frequencies line up: different ingredients hit the same odor terms, and not too many odor terms are struck. And as in music, when a dish is out of tune, the combination will be jarringly dissonant, even if each item is fine individually.

Of course, this music analogy isn’t a perfect fit for thinking about flavors: chemical changes brought about by cooking or by reactions between compounds in the foods change the histogram. The music analogy also doesn’t cover other variables in foods, such as texture, weight, or mouthfeel. This method works best with ingredients whose primary purpose is conveying odor. Soups, ice creams, even soufflés: all are methods of transporting the flavors and aromas of ingredients without carrying the texture or volume of the original ingredient.

Heston Blumenthal, the UK-based chef best known for his restaurant The Fat Duck, has used a number of novel flavor combinations: strawberry and coriander, snails and beetroot, chocolate and pink peppercorn, carrot and violet, pineapple and certain types of blue cheese, and banana and parsley. They sound crazy, but the research supports them and they’ve worked in his dishes.

Many chefs—often pros, but also non-pros who’ve been cooking for years—can imagine flavor combinations in their heads, doing something similar to this process mentally. Just as a composer imagines each voice and track in a piece of music, an experienced cook imagines the profile of the entire dish, from the appearance to texture and aromas. Good cooks think about which notes are missing or are too soft and figure out what ingredients can be added to bring up those values or bring down others.

What about achieving entirely new pairings, combinations that have no precedence in tradition? That’s where this method shines. Research chefs searching for new ideas spend an inordinate amount of time working on new flavor combinations. Some top-tier restaurants run research kitchens, devoted to laboratory work and staffed by individuals holding both master’s-level degrees in hard sciences like chemistry and degrees from top-tier culinary institutions. For novel high-end restaurants and the packaged food industry, coming up with new flavors can be extremely lucrative. While the more unusual combinations they come up with may sound unappealing or call for uncommon ingredients—how often do you have caviar on hand?— they do work. At the very least, you might find these types of tools a fun source of inspiration to try new things. Experiment!

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Ingredients similar to chocolate based on chemical similarity, grouped by food category—from the traditional (fruits like raspberry and strawberry) to the uncommon (Gruyère, cod, tomatoes).

GRAPH USED BY PERMISSION OF BERNARD LAHOUSSE OF FOODPAIRING.COM

Fish Tacos with Pickle and Strawberry Relish

I began this chapter with the conundrum of how to combine pickles, strawberries, and tortillas—a combination of ingredients that doesn’t entice one to race off to the kitchen. But what if we had access to a supercomputer that could chew on the possibilities? IBM’s research project, Chef Watson (http://www.ibmchefwatson.com), does exactly this, and has proved to be enticing enough to merit its own cookbook, Cognitive Cooking with Chef Watson (Sourcebooks, 2015). I take this development as proof that either computers are taking over the world or one no longer needs a pulse to land a book contract—possibly both.

Chef Watson is a curious creation, based on analyzing co-occurrence of ingredients in its database of recipes (currently, some 9,000 recipes from Bon Appétit) and chemical compound similarity between ingredients. When not constrained too much—say, starting with eggs and chocolate—the suggested recipes make sense and are just quirky enough to inspire. Making brownies with a cup of Gruyère cheese instead of butter? The cheese will provide the necessary fat, and cream cheese in brownies isn’t unheard of. With more constraints—pickles, strawberries, and tortillas—the recipe suggestions go from quirky to weird. Even so, the results are still insightful; in the case of these three ingredients, most of the suggested recipes include fish and take the form of tacos. Strawberries happen to share a number of odor compounds with tomatoes, and knowing this, it’s easier to see how the combination could work!

In a small bowl, create the taco topping by mixing together:

½

cup (90g) strawberries, hulled and diced

¼

cup (40g) pickles, diced and drained

¼

cup (15g) cilantro, chopped

1

tablespoon (15 mL) white wine, dry vermouth, or gin

Set the topping aside.

Prepare ½ pound (~250g) fish or seafood such as halibut, tuna, or crab by cutting it into large chunks, 1–2” / 3-5 cm. Coat the pieces in breadcrumbs, mixing ¼ cup (~20g) panko crumbs or breadcrumbs with ½ teaspoon (2g) sea salt and then dredging the pieces of seafood in the crumbs.

In a frying pan over medium heat, melt 2 tablespoons (30g) butter. Once the butter has just begun to brown, add the fish pieces. Cook for about 2 minutes and then flip the pieces, continuing to cook and flip them until the fish is cooked and the breadcrumbs are golden brown and toasted.

Serve by placing a taco shell or tortilla on a plate and then topping with a spoonful of the fish and a smaller spoonful of the topping. Squeeze a slice of lime on top.

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Lab: How Well Do You Know Your Flavors?

How well do you think you know your flavors? Here are two different group activities to challenge participants to think about what they’re sensing. The first experiment uses both taste and smell and requires more advance prep work. The second experiment uses only smell and avoids potential allergy concerns, but isn’t quite as rewarding.

First, grab these supplies:

For Experiment #1: Flavor (both taste and smell)

10 small sample cups or an ice cube tray with at least 10 compartments (if you’re going to do this in a larger group, plan on 6–10 people per setup; for a group of 36, 4 ice cube trays with folks divided into 4 groups works well)

Ingredients for tasting. (A few of these are a little obscure, but they serve as fun challenges for tasters familiar with common flavors. If your local grocery store doesn’t carry all of these, snag other ingredients that you feel will work well based on where you live and how experienced the tasters will be.)

• White turnip, cooked and diced

• Cooked polenta, diced (some stores carry packaged cooked polenta that can be easily sliced)

• Hazelnuts ground to the size of coarse sand

• Cilantro paste (look in the frozen food section, or buy fresh cilantro and use a mortar and pestle to make a paste)

• Tamarind paste or tamarind concentrate

• Oreo cookies, ground (both chocolate cookie and cream filling; when ground in a blender or food processor they’ll turn into a coarse, black powder)

• Almond butter (or any nut butter other than peanut butter)

• Caraway seeds

• Jicama root, diced

• Puréed blackberry

Pen to mark cups; if you’re using ice cube trays, masking tape that you can write on

Small sample spoons for each participant (if you don’t mind “double dipping,” one spoon per person is fine)

Paper and pencil for each participant to write down their guesses

For Experiment #2: Smell only

15 plastic or waxed paper cups (one set of smell samples should be good for 30–40 people; for larger groups, multiply accordingly)

Ingredients to smell. (If you have a hard time getting some of these, try substituting something similar, or simply drop the item.)

• Almond extract

• Baby powder

• Chocolate chips

• Coffee beans

• Cologne or perfume (spray directly into the cup or onto a tissue)

• Garlic, crushed

• Glass cleaner

• Grass, chopped up

• Lemon, sliced into wedges

• Maple syrup (real maple syrup, not that “pancake syrup” stuff)

• Orange peels

• Soy sauce

• Tea leaves

• Vanilla extract

• Wood shavings (e.g., sawdust, pencil shavings)

15 small pieces of gauze or cheesecloth to cover each cup; 15 rubber bands to secure gauze or cheesecloth

Paper and pencil for each participant to write down their guesses

Here’s what to do:

Experiment #1: Flavor (both taste and smell)

In advance:

  1. Number each cup from 1 to 10. If you’re using ice cube trays, place a strip of masking tape down the length of the tray so that you can label each compartment, and number them 1 through 10.

  2. Dice or purée the food items to remove any visual clues about their normal size and texture and transfer them to the appropriate numbered spots. Try to keep the diced items all of a consistent size, around 1/3” / 1 cm.

  3. Cover the samples; if you’re preparing them more than a few hours ahead, store them in the fridge.

When ready:

  1. Make sure to alert anyone who has nut allergies or uncommon allergies that they should abstain from partaking.

  2. Instruct participants to sample items and record their guesses. It’s best if everyone makes the first guess in silence! Ask them to list what their first thoughts are, and if they change their minds, to list additional guesses instead of crossing out earlier ideas.

Experiment #2: Smell only

In advance:

  1. Number each cup from 1 to 15.

  2. Add the item to the cup and cover with a square of gauze or cheesecloth, securing it with a rubber band around the top.

When ready:

Pass the cups around for participants to smell. The order they smell the samples in doesn’t matter, but for larger groups it’s easier to pass them around in order. Ask participants to write down their guesses but not to say anything out loud.

Investigation time!

These experiments use common items, mostly foods from your grocery store. Most of the suggested items aren’t likely to be part of your day-to-day experience but should still be familiar. You might be surprised at the degree of difficulty in identifying some of them! It’s surprising to discover how much “knowing” what a food item is—seeing the cilantro leaf or being told it’s a hazelnut chocolate cupcake—allows us to sense the flavors we expect from it.

For each item, ask people what their guesses were. What does the group notice about everyone’s guesses? Are some items easy to guess? How many people guessed correctly for Oreo cookies versus less-processed foods? Are some people much better at detecting odors than others?

If you are interested in taking a “real” smell test, researchers at the University of Pennsylvania have developed a well-validated scratch-and-sniff test called UPSIT that you can mail order. Search online for “University of Pennsylvania Smell Identification Test.”

Gail Vance Civille on Learning Flavors

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PHOTO USED BY PERMISSION OF GAIL VANCE CIVILLE.

Gail Vance Civille is a self-described “taste and smell geek” who started out working as a sensory professional at the General Foods technical center and is now president and owner of Sensory Spectrum, Inc., in New Providence, New Jersey.

How does somebody who is trained to think about flavor, taste, and sensation perceive these things differently than the layperson?

The big difference between a trained taster and an untrained taster is not that your nose or your palate gets better, but that your brain gets better at sorting things out. You train your brain to pay attention to the sensations that you are getting and the words that are associated with them.

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It sounds like a lot of it is about the ability to recall things that you’ve experienced before. Are there things that one can do to help get one’s brain organized?

You can go to your spice and herb cupboard and sort and smell the contents. For example, allspice will smell very much like cloves. That’s because the allspice berry has clove oil or eugenol in it. You’ll say, “Oh, wow, this allspice smells very much like clove.” So the next time you smell them, you might say, “Clove, oh but wait, it could be allspice.”

So, in cooking, is this how an experienced chef understands how to do substitutions and to match things together?

Right. I try to encourage people to experiment and learn these things so that they know, for example, that if you run out of oregano you should substitute thyme and not basil. Oregano and thyme are chemically similar and have a similar sensory impression. You have to be around them and play with them in order to know that.

With herbs and spices, how do you do that?

First you learn them. You take them out, you smell them, and you go, “Ah, okay, that’s rosemary.” Then you smell something else and you go, “Okay, that’s oregano,” and so on. Next you close your eyes and put your hand out, pick up a bottle, and smell it and see if you can name what it is. Another exercise to do is to see if you can sort these different things into piles of like things. You will sort the oregano with the thyme and, believe it or not, the sage with the rosemary, because they both have eucalyptol in them, which is the same chemical and, therefore, they have some of the same flavor profile.

What about lining up spices and foods—for example, apples and cinnamon?

You put cinnamon with an apple because the apple has a woody component, a woody part of the flavor like the stem and the seeds. And the cinnamon has a wood component, and that woody component of the cinnamon sits over the not-so-pleasant woodiness of the apple, and gives it a sweet cinnamon character. That’s what shows. Similarly, in tomatoes you add garlic or onion to cover over the skunkiness of the tomatoes, and in the same way basil and oregano sit on top of the part of the tomato that’s kind of musty and viney. Together they create something that shows you the best part of the tomato and hides some of the less lovely parts of the tomato. That’s why chefs put certain things together. They go, they blend, they merge and meld, and actually create something that’s unique and different and better than the sum of the parts.

It takes a while to get at that level, because you have to really feel confident both as a cook and getting off the recipe. Please, get off the recipe. Let’s get people off these recipes and into thinking about what tastes good. Taste it and go, “Oh, I see what’s missing. There’s something missing here in the whole structure of the food. Let me think about how I’m going to add that.” I can cook something and think to myself, there’s something missing in the middle, I have some top notes and I have maybe beef and it’s browned and it has really heavy bottom notes. I think of flavor like a triangle. Well, then I need to add oregano or something like that. I don’t need lemon, which is another top note, and I don’t need brown caramelized anything else because that’s in the bottom. You taste it, and you think about how you are going to add that.

How does somebody tasting something answer the question, “Hey, if I wanted to do this at home, what should I do?”

I can sit in some of the best restaurants in the world, and not have a clue what’s in there. I can’t taste them apart, it’s so tight. So it’s not just a matter of experience; it’s also a matter of the experience of the chef. If you have a classically trained French or Italian chef, they can create something where I will be scratching my head, going “Beats me, I can’t tell what’s in here,” because it’s so tight, it’s so blended, that I can’t see the pieces. I only see the whole.

Now this does not happen with a lot of Asian foods, because they are designed to be spiky and pop. That’s why Chinese food doesn’t taste like French and Italian food. Did you ever notice that? Asian foods have green onions, garlic, soy, and ginger, and they’re supposed to pop, pop, pop. But the next day they’re all blending together and this isn’t quite so interesting.

This almost suggests that if one is starting out with cooking, one approach is to go out and eat Asian food and try to identify the flavors?

Oh, definitely. That’s a very good place to start, and Chinese is a better place to start than most. I’ve had some Asian people in classes that I’ve taught get very insulted when I talk about this, and I’m like, no, no, no, that’s the way it’s supposed to be. That’s the way Asian food is; it’s spiky and interesting and popping, and that’s not the way classic European food, especially southern European food, is.

In the case of classic European dishes, let’s say you’re out eating eggplant Parmesan, and it’s just fantastic. How do you go about trying to figure out how to make that?

I would start identifying what I am capable of identifying. So you say, “Okay, I get tomato, and I get the eggplant, but the eggplant seems like it’s fried in something interesting, and not exactly just peanut oil or olive oil. I wonder what that is?” Then I would ask the waiter, “This is very interesting. It’s different from the way I normally see eggplant Parmesan. Is there something special about the oil or the way that the sous chef fries the eggplant that makes this so special?” If you ask something specific, you are more likely to get an answer from the kitchen than if you say, “Can you give me the recipe?” That is not likely to get you an answer.

When thinking about the description of smells, it seems like the vocabulary around how we describe the taste is almost as important.

It’s the way that we communicate our experience. If you said “fresh” or “it tasted homemade,” you could mean many things. These are more nebulous terms than, say, “You could taste the fried eggplant coming through all of the sauce and all of the cheese.” This is very, very specific, and in fact, “fresh” in this case is freshly fried eggplant. I once had a similar situation with ratatouille in a restaurant. I asked the waiter, “Could you tell me please if this ratatouille was just made?” The waiter said, “Yes, he makes it just ahead and he doesn’t put all the pieces together until just before we serve dinner.” When people say “homemade,” they usually mean that it tastes not sophisticated and refined, but that it tastes like it had been made by a good home cook, so it’s more rustic, but very, very well put together.

Is there a certain advantage that the home chef has because he is assembling the ingredients so close to the time that the meal is being eaten?

Oh, there’s no question that depending upon the nature of the food itself, there are some things that actually benefit from sitting long in the pot. Most home chefs, either intuitively or cognitively, have a good understanding of what goes with what, and how long you have to wait for it to reach its peak.

You said a few minutes ago, “We need to get off the recipe.” Can you elaborate?

When I cook, I will look at seven or so different recipes. The first time I made sauerbraten, I made it from at least five recipes. You pick things from each based on what you think looks good, and what the flavor might be like. I think the idea of experimenting in the classic sense of experimenting is fine. Geeks should be all about experimenting. What’s the worst thing that’s going to happen? It won’t taste so great. It won’t be poison, and it won’t be yucky; it just may not be perfect, but that’s okay. I think when you do that, it gives you a lot more freedom to make many more things because you’re not tied to the ingredient list. The recipe is, as far as I’m concerned, a place to start but not the be all, end all.

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