Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Tomato Pie
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.
Prepare
Preheat the oven to 350°F (175°C).
Assemble
Cover the bottom of a pie dish with peeled and chopped tomatoes.
Sprinkle with chopped parsley, chopped onion, butter, pepper, and coarse sea salt.
Top with a layer of mashed potatoes.
Bake
Bake until golden brown.
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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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Parsley + potatotop 5% of all pairsSmell alikemoderateCooked together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Tomato + potatotop 5% of all pairsSmell alikestrongCooked together2,798 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 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
- Peeled and chopped tomatoes
- Forms the juicy base layer that moistens the pie as it bakes.
- Butter
- Adds richness and fat, helping the top and seasonings brown and taste rounded.
- Chopped onion
- Contributes savory depth and aroma as it softens and mingles with the tomatoes.
- Mashed potatoes
- Forms the starchy top layer that sets as it cooks and browns in the oven.
The step that matters
Bake until golden brown. Baking long enough lets the potato topping brown and set, while the tomato layer releases moisture. Pulling it too early leaves a soggy, pale top.
Swap the tomato
How well each one fits the dish's main ingredients (parsley, onion, butter, pepper, potato):
- Carrotfits better
- Chivefits better
- Leekfits better
- Tomatothe original
Fit is the average pairing score against parsley, onion, butter, pepper, potato. 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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