Why it works: Onion and potato 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 ↓
Vegetable Hot-pot
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Boil the diced turnip until tender and cook the soaked tapioca until clear.
Layer and bake
In a buttered baking dish, layer the chopped onion, followed by the tapioca, potatoes, turnip, and tomato, adding a little butter on each layer. Repeat the layering until the dish is full, finishing with a layer of potatoes on top.
Bake in a 400°F (200°C) oven for one hour. Remove the cover during the last 15 minutes and add a layer of bread crumbs to 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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Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + potatotop 5% of all pairsSmell alikestrongCooked together2,798 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Turnip + oniontop 5% of all pairsSmell alikestrongCooked together7,585 recipes
Shared aroma: coumarin (sweet, hay).
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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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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
- Potatoes
- Form the bulk of the dish and become tender and starchy as they bake.
- Tapioca
- Thickens the juices as it cooks, giving the layers a soft, slightly gelled texture.
- Stewed tomato
- Adds moisture and acidity that flavour the layers as they cook down.
- Turnip
- Adds body and a mild, slightly peppery flavour while staying tender in the layers.
- Bread crumbs
- Form a topping that browns in the oven once the cover is removed.
The step that matters
Removing the cover for the last 15 minutes. Covered baking traps steam so the layers cook through. Uncovering lets surface moisture evaporate and the bread crumbs brown; removing the cover too early can dry the dish, while leaving it on prevents browning.
Swap the turnip
How well each one fits the dish's main ingredients (onion, tomato, potato, butter, pepper, bread):
- Capsicumfits better
- Chivefits better
- Carrotfits better
- Turnipthe original
Fit is the average pairing score against onion, tomato, potato, butter, pepper, bread. 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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