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Omelette Aux Rognons, Sauce Tomate

A French omelette filled with stewed kidneys and topped with tomato sauce and wine.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Tomato and wine are a kitchen classic. They rank in the top 10% of all ingredient pairs, and cooks put them together in 2,759 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Omelette Aux Rognons, Sauce Tomate

Ingredients

Directions

Prepare the omelette

  1. In a bowl, beat the eggs until well mixed.

  2. Heat butter in a skillet over medium heat until melted.

  3. Pour the eggs into the skillet and cook until the edges begin to set.

Fill and serve

  1. Place the stewed kidneys across the center of the omelet.

  2. Fold the omelet over the kidneys and slide it onto a plate.

  3. Pour the tomato sauce and any remaining kidney gravy over the omelet.

  4. Add more wine to the sauce if needed and serve immediately.

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 + winetop 10% of all pairs
    Smell alikemoderate
    Cooked together2,759 recipes

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

  2. Butter + winetop 13% of all pairs
    Smell alikemoderate
    Cooked together8,645 recipes

    Shared aroma: 2-furfurylthiol (coffee, roasted).

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

    Shared aroma: ethanol (alcoholic, ethereal).

  4. Tomato + saucetop 15% of all pairs
    Smell alikelow
    Cooked together5,469 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  5. Egg + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

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

Eggs
Set into a tender structure that holds the filling together when folded.
Butter
Adds richness and helps the eggs release from the skillet while cooking.
Kidneys
Provide the main savory filling, tender after slow stewing.
Tomato sauce
Adds moisture and acidity that balance the rich eggs and kidneys.
Wine
Adds acidity and depth to the sauce once it is reduced or adjusted.

The step that matters

Pour the eggs into the skillet and cook until the edges begin to set. Eggs cook quickly and turn rubbery if overheated. Removing the pan from direct heat while the centre is still slightly loose lets residual heat finish the set, keeping the omelette soft enough to fold without cracking.

Swap the tomato

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

  1. Shallotfits better
  2. Tomatothe original
  3. Asparagusfits about as well
  4. Chivefits about as well

Fit is the average pairing score against egg, butter, sauce, wine. 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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