Why it works: Lettuce and endive match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 284 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓
Spring Vegetable Soup
Ingredients
Directions
Make the soup
In a large pot, stew the knuckle of veal in cold water with salt, carrot, turnips, and onion for three hours over low heat.
Skim off the scum at the beginning and fat at the end.
After one hour, add the chopped lettuce hearts, celery, endive, white onion, cucumber, and asparagus.
Season with white pepper.
Serve
Serve the meat with some of the vegetables, melted butter, chopped parsley, and optional bacon or pickled pork.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Lettuce + endivetop 1% of all pairsSmell alikestrongCooked together284 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Lettuce + cucumbertop 1% of all pairsSmell alikestrongCooked together1,409 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Turnip + endivetop 1% of all pairsSmell alikestrongCooked together65 recipes
Shared aroma: coumarin (sweet, hay).
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Carrot + celerytop 1% of all pairsSmell alikestrongCooked together10,173 recipes
Shared aroma: myristicin (spice, warm).
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Turnip + lettucetop 1% of all pairsSmell alikestrongCooked together526 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Knuckle of veal
- Gives the broth its body and rich meaty flavor as it simmers slowly.
- Lettuce hearts
- Add tender vegetable texture and a mild, fresh flavor to the soup.
- Celery
- Contributes aromatic savory flavor and some crisp texture to the broth.
- Asparagus
- Adds fresh, slightly grassy flavor and tender-crisp texture to the soup.
The step that matters
Skim off the scum at the beginning and fat at the end. Scum rising early can cloud the broth and taste impure, while leftover fat makes the soup greasy. Removing both keeps the broth clear and clean-tasting.
Swap the onion
How well each one fits the dish's main ingredients (veal, carrot, turnip, lettuce, celery, endive, cucumber):
- Beetrootfits better
- Leekfits better
- Parsnipfits better
- Onionthe original
Fit is the average pairing score against veal, carrot, turnip, lettuce, celery, endive, cucumber. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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