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Tomatoes and Onion Pie

A pie of sliced tomatoes and onions with soaked tapioca, pepper, salt, butter, and gravy, topped with wholemeal crust.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Tomato and pepper are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Tomatoes and Onion 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.

Assemble

  1. Layer sliced tomatoes and onions in a pie dish alternately.

  2. Add soaked tapioca, pepper, salt, and butter.

  3. Pour in enough water to create gravy.

  4. Cover with wholemeal crust.

Bake

  1. Bake at 350°F (175°C) for 1.5 hours.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Tomato + peppertop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  2. Tomato + oniontop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  4. Onion + buttertop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  5. Pepper + buttertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Tomatoes
Provide the main filling, releasing juice that combines with the water to form a gravy.
Spanish onions
Add savory sweetness and aroma as they soften and cook down in the pie.
Tapioca
Thickens the juices as it absorbs liquid and softens during baking, giving the filling body.
Wholemeal crust
Encloses the filling and holds in moisture while the pie bakes.

The step that matters

Pour in enough water to create gravy. Tapioca needs enough liquid to hydrate and thicken during baking. Too little water can leave the filling dry or grainy, while the juices from the tomatoes and onions add to the final sauce.

Swap the tomato

How well each one fits the dish's main ingredients (onion, pepper, butter):

  1. Potatofits better
  2. Capsicumfits better
  3. Chivefits better
  4. Tomatothe original

Fit is the average pairing score against onion, pepper, butter. 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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