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Kidney Omelet

A savory omelet filled with sautéed lamb or sheep kidneys in brown sauce.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Kidney Omelet

Ingredients

Directions

Prepare the kidneys

  1. Skin the kidneys and cut them into very thin slices.

Cook the filling

  1. In a sauté pan, melt the butter and sauté the onion until soft.

  2. Add the kidney slices, season with salt and pepper, and moisten with brown sauce.

  3. Cook for about 5 minutes until the kidneys are done.

Assemble and serve

  1. Prepare a plain omelet and place the cooked kidney mixture in the center before serving.

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

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

  2. Lamb + peppertop 12% of all pairs
    Smell alikemoderate
    Cooked together3,165 recipes

    Shared aroma: 2-nonenal (fatty, green).

  3. Butter + saucetop 15% of all pairs
    Smell alikelow
    Cooked together15,338 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  4. Butter + oniontop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  5. Lamb + oniontop 16% of all pairs
    Smell alikemoderate
    Cooked together2,407 recipes

    Shared aroma: gamma-nonanolactone (coconut, sweet).

Butter and sauce barely smell alike, yet cooks put them together in 15,338 recipes: they work on texture and structure more than aroma.

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

What each ingredient does

Lamb's or sheep's kidneys
Provide the meaty filling that gives the omelet its main texture and flavor.
Butter
Adds fat for sautéing, carrying flavor and promoting gentle browning of the onion.
Onion
Adds sweetness and aroma as it softens in the butter.
Brown sauce
Moistens the kidneys and adds savory depth and richness to the filling.

The step that matters

Cook the kidneys until just done. Kidney turns tough and rubbery when overcooked, so the thin slices need only a short, brief cook over steady heat until they are just done.

Swap the onion

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

  1. Capsicumfits better
  2. Potatofits better
  3. Tomatofits better
  4. Onionthe original

Fit is the average pairing score against lamb, butter, pepper, sauce. 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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