Why it works: Butter and bread are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
Tomatoes with Walnuts
Ingredients
Directions
Prepare the tomatoes
Plunge tomatoes in boiling water, peel, and place in a buttered saucepan to bake until tender.
Rub the baked tomatoes through a sieve.
Make the filling
Cook chopped onion in butter until light brown.
Add the sieved tomatoes, walnuts, bread crumbs, and cheese to the onion, stirring until well blended.
Stir in the beaten eggs, salt, and pepper, and cook for 5 minutes.
Serve
Serve hot on rounds of toast.
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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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Bread + cheesetop 7% of all pairsSmell alikemoderateCooked together2,130 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + cheesetop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Tomato + breadtop 10% of all pairsSmell alikemoderateCooked together1,013 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Provide the main body, moisture, and bright acidity of the filling.
- Eggs
- Bind the mixture and set it into a soft, sliceable texture when heated.
- Bread crumbs
- Absorb excess tomato moisture and give the filling body.
- Walnuts
- Add fat, crunch, and a nutty flavor that contrasts the soft filling.
- Cheese
- Adds savory, salty flavor and helps bind the filling.
The step that matters
Cooking the beaten eggs. Egg proteins set with heat, so cooking over high heat or too long can curdle them and leave the filling grainy. Stir gently over moderate heat until just thickened.
Swap the onion
How well each one fits the dish's main ingredients (tomato, butter, walnut, meat, bread, cheese, egg):
- Capsicumfits better
- Asparagusfits better
- Potatofits better
- Onionthe original
Fit is the average pairing score against tomato, butter, walnut, meat, bread, cheese, egg. 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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