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 ↓
Roman 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 the mold
Grease a plain mold with butter and sprinkle vermicelli over it.
Line the mold with short crust pastry.
Fill and bake
Mix all ingredients together and moisten with a little milk.
Put the mixture into the mold and cover the top with pastry.
Bake on the lower shelf of the oven at 350°F (175°C) until the pastry is cooked.
Serve
Turn out and serve with brown sauce or tomato sauce.
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).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Cheese + buttertop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Cheese + milktop 10% of all pairsSmell alikemoderateCooked together4,426 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cold meat
- Forms the bulk of the filling and provides savoury flavour.
- Grated cheese
- Melts into the filling, adding richness and binding the mixture together.
- Cooked macaroni
- Adds body and a soft, starchy texture to the filling.
- Butter
- Greases the mold and adds fat for flavour and a tender finish.
The step that matters
Moisten with a little milk. Too little liquid leaves the filling dry and crumbly, while too much makes it soggy and can wet the pastry. Add the milk gradually so the mixture holds together when pressed into the mold.
Swap the onion
How well each one fits the dish's main ingredients (meat, cheese, pepper, mustard, butter, milk):
- Potatofits better
- Capsicumfits better
- Asparagusfits about as well
- Onionthe original
Fit is the average pairing score against meat, cheese, pepper, mustard, butter, milk. 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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