Why it works: Onion and mustard 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 ↓
Pickled Tomatoes
Ingredients
Directions
Cure the tomatoes
Prick the tomatoes with a large needle and soak them in a strong saltwater solution for eight days.
Remove the tomatoes from the brine and soak them in a vinegar and water solution for twenty-four hours.
Prepare the onions
Scald the onions in vinegar and let them cool.
Combine and pickle
Drain the tomatoes and combine them with the cooled onions, vinegar, mustard seed, and cloves.
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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Onion + mustardtop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
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).
-
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
What each ingredient does
- Ripe tomatoes
- Form the main body of the pickle and absorb the brine and vinegar flavour.
- Coarse sea salt
- Draws water out of the tomatoes and seasons them during the brine soak.
- Vinegar
- Provides acidity that preserves the tomatoes and gives the pickle its sharp flavour.
- Onions
- Add sweetness and savoury bulk that balances the sharp vinegar.
- Mustard seed
- Adds a sharp, pungent aroma and flavour to the pickling liquid.
- Cloves
- Contribute warm, aromatic spice flavour to the pickle.
The step that matters
Soaking the tomatoes in strong brine for eight days. The brine must be strong enough to draw water out and season the tomatoes through. A weak brine can let the tomatoes spoil or stay bland, so the concentration and full soaking time matter.
Swap the clove
How well each one fits the dish's main ingredients (tomato, onion, vinegar, mustard):
- Garlicfits better
- Capersfits better
- Tarragonfits better
- Clovethe original
Fit is the average pairing score against tomato, onion, vinegar, mustard. 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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