Why it works: Pepper and tomato are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Tomato Salad
Ingredients
Directions
Make the dressing
Rub the yolks of the hard-boiled eggs into a smooth paste, adding the salt, cayenne pepper, sugar, mustard, and salad oil gradually.
Beat a raw egg until frothy and stir it into the mixture, then add the vinegar.
Assemble and serve
Peel and slice the tomatoes, and arrange them on a dish.
Pour the egg mixture over the tomatoes and serve.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Pepper + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mustard + tomatotop 11% of all pairsSmell alikemoderateCooked together2,482 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + vinegartop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Hard-boiled eggs
- Their yolks form a smooth, rich base that thickens the dressing.
- Salad oil
- Adds fat that emulsifies with the yolks for a creamy texture.
- Prepared mustard
- Its emulsifiers help hold the oil and vinegar together in the dressing.
- Vinegar
- Adds acidity that brightens the dressing and balances the richness of the yolks.
- Ripe tomatoes
- Provide the fresh, juicy base that the dressing is poured over.
The step that matters
Adding the oil gradually. Oil must be worked into the yolk paste slowly so it emulsifies. Adding it all at once can split the dressing into separate layers of oil and egg.
Swap the tomato
How well each one fits the dish's main ingredients (egg, pepper, sugar, mustard, vinegar):
- Horseradishfits better
- Capsicumfits better
- Shallotfits better
- Tomatothe original
Fit is the average pairing score against egg, pepper, sugar, mustard, vinegar. 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.
More tomato salad recipes
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Chicken Salad623 recipes
Salad Dressing491 recipes
Cold Slaw160 recipes
Boiled Salad Dressing67 recipes