Why it works: Onion and tomato are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 20,633 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Spaghetti with Tomatoes
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Cook the spaghetti
Cook the onion with the cloves in 2½ quarts of boiling salted water until the spaghetti is soft.
Remove the onion.
Assemble and bake
Butter a baking dish and add alternate layers of spaghetti and tomato puree.
Sprinkle each layer of spaghetti with grated parmesan cheese, salt, cayenne, and grated onion.
Cover with buttered crumbs and bake at 350°F (175°C) until heated through and crumbs are browned.
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 + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + parmesan cheesetop 9% of all pairsSmell alikemoderateCooked together4,163 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Tomato + parmesan cheesetop 9% of all pairsSmell alikemoderateCooked together2,490 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Clove + tomatotop 12% of all pairsSmell alikemoderateCooked together3,474 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
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Onion + clovetop 13% of all pairsSmell alikemoderateCooked together16,901 recipes
Shared aroma: 2-nonanone (fruity, floral).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Spaghetti
- Forms the bulk of the dish, holding the layers together when baked.
- Tomato puree
- Provides moisture and a tangy, savoury base that softens the pasta as it bakes.
- Parmesan cheese
- Adds salty, savoury depth and helps the top brown as it bakes.
- Buttered crumbs
- Form a crisp, golden topping through browning in the oven.
The step that matters
Cooking the spaghetti until soft. Spaghetti cooked only until firm will stay stiff after baking, while over-softened pasta turns mushy in the oven. Cooking it until just tender gives a layered dish that holds its shape and keeps some texture.
Swap the clove
How well each one fits the dish's main ingredients (onion, butter, tomato, parmesan cheese):
- Garlicfits better
- Celeryfits better
- Thymefits better
- Clovethe original
Fit is the average pairing score against onion, butter, tomato, parmesan cheese. 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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