Why it works: Tomato and pepper match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and 17,913 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
The recipe
Ingredients
Directions
Prepare the vegetables
Slice the tomatoes, peppers, and onion thinly.
Soak the onion and peppers in ice water for 30 minutes.
Drain the vegetables and arrange them in alternate layers on a bed of lettuce.
Finish and serve
Sprinkle chopped pickled nasturtiums or chopped truffle over the salad.
Add the dressing just before serving.
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 aroma chemistry they share, and how many recipes mention both.
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Tomato + peppertop 4% of all pairsAroma overlapstrongMentioned together17,913 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + lettucetop 4% of all pairsAroma overlapstrongMentioned together1,654 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + oniontop 4% of all pairsAroma overlapstrongMentioned together20,622 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + lettucetop 6% of all pairsAroma overlapstrongMentioned together4,037 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + lettucetop 6% of all pairsAroma overlapstrongMentioned together3,562 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Provide juicy body and bright acidity that contrasts with the dressing.
- Sweet green peppers
- Add crisp texture and a fresh, mildly bitter vegetal flavor.
- Spanish onion
- Adds sharp pungency, which soaking in ice water mellows.
- Plain french dressing
- Supplies oil and acid that season the salad and coat the vegetables.
- Lettuce
- Forms a crisp, tender bed that holds the layered vegetables.
The step that matters
Add the dressing just before serving. Salt and acid in the dressing draw water out of sliced tomatoes and peppers, so they turn limp and watery if dressed too early. Adding it at the last moment keeps the vegetables crisp.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (tomato, pepper, lettuce, truffle):
- Capsicumbetter flavor fit
- Asparagusbetter flavor fit
- Potatobetter flavor fit
- Onionthe original
Fit is the average pairing score against tomato, pepper, lettuce, truffle. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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