Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Sausage and Tomato Pie
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Boil the sausage in water for 5 minutes, then remove the skins and cut in half.
Slice and fry the onions until well browned.
Assemble and bake
In a pie dish, layer half the sausage, cover with the browned onions and thick slices of tomatoes.
Add the remaining sausage and pour in the seasoned stock.
Mash the potatoes with a little milk and salt, then pile on top of the dish.
Bake in a moderate oven at 350°F (175°C) for 30 minutes.
Make a hole in the center and fill it with seasoned gravy.
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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
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).
-
Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 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
- Sausage
- Provides the main meaty filling and savoury flavour of the pie.
- Onions
- Browning them first builds sweetness and deeper savoury flavour through the filling.
- Tomatoes
- Add moisture and a bright acidity that balances the rich sausage.
- Potatoes
- Mashed, they form a soft topping that holds moisture and browns in the oven.
- Stock
- Adds moisture and savoury flavour that soaks into the filling as it bakes.
The step that matters
Frying the onions until well browned. Deep browning develops sweet, savoury flavours through the Maillard reaction. Pale onions stay sharp and taste raw in the finished pie.
Swap the onion
How well each one fits the dish's main ingredients (tomato, potato, pepper):
- Capsicumfits better
- Carrotfits better
- Okrafits better
- Onionthe original
Fit is the average pairing score against tomato, potato, pepper. 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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