Why it works: Onion and tomato are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 20,633 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Spanish Beefsteak
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).
Place the steak in a pie dish and add a little water to baste it.
Bake and serve
Bake for 30 minutes.
Remove from the oven and cover with sliced onions; bake until the onions are tender.
Top with sliced tomatoes and bake for an additional 30 minutes.
Sprinkle grated cheese on top and return to the oven until melted.
Baste the steak every 10 minutes during baking.
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 + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + cheesetop 13% of all pairsSmell alikemoderateCooked together2,896 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + cheesetop 16% of all pairsSmell alikemoderateCooked together4,849 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
- Round steak
- Provides the main protein; slow oven baking with basting keeps the meat moist and tender.
- Onion
- Softens as it bakes, adding sweetness and savoury flavour to the topping.
- Tomato
- Releases juice as it bakes, adding moisture and a bright acidity to the dish.
- Grated cheese
- Melts over the top, adding fat, richness and a browned savoury finish.
The step that matters
Basting the steak every 10 minutes. Round steak is lean and can dry out in the oven. Regular basting with water keeps the surface moist during the long bake, helping the meat stay tender.
Swap the onion
How well each one fits the dish's main ingredients (tomato, cheese):
- Capsicumfits better
- Potatofits better
- Eggplantfits better
- Onionthe original
Fit is the average pairing score against tomato, cheese. 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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