Why it works: Mustard and onion match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 9,259 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
To Pickle Tomatoes
Ingredients
Directions
Layer ripe tomatoes in a jar, sprinkling coarse sea salt over each layer.
The next day, remove tomatoes, wipe them off, and wash the jar thoroughly.
Dry the jar completely and return the tomatoes in the same manner, letting them stand for another day.
Drain and wipe the tomatoes, then place them in a clean jar with mustard seed, cloves, whole black peppercorns, and sliced onions if desired.
Pour cold vinegar over the tomatoes and seal the jar for storage.
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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Mustard + oniontop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + clovetop 8% of all pairsSmell alikestrongCooked together3,829 recipes
Shared aroma: methyleugenol (clove, spice).
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Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + mustardtop 11% of all pairsSmell alikemoderateCooked together2,482 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
Swap the clove
How well each one fits the dish's main ingredients (tomato, mustard, onion, vinegar):
- Garlicfits better
- Capersfits better
- Tarragonfits better
- Clovethe original
Fit is the average pairing score against tomato, mustard, onion, vinegar. Candidates are from the same food group and used in at least 100 recipes.
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