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Sardine Sandwiches

A sandwich made with sardines, pepper, salt, lettuce, and lemon juice, served on buttered bread or cold biscuits.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Sardine Sandwiches

Ingredients

Directions

Prepare the sardines

  1. Drain the oil from the sardines.

  2. Place the sardines in hot water for a few minutes to remove grease.

  3. Pour out the water.

  4. Dry the sardines with a cloth.

  5. Scrape off the skins.

Make the filling

  1. Pound the sardines in a mortar until they form a paste.

  2. Add pepper, salt, and tiny pieces of lettuce to the sardine paste.

  3. Alternatively, chop the sardines finely.

  4. Add a few drops of lemon juice.

Assemble

  1. Spread the mixture on previously cut sandwiches.

  2. Spread between buttered bread or cold biscuits.

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. Pepper + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

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

  2. Pepper + lettucetop 9% of all pairs
    Smell alikemoderate
    Cooked together4,037 recipes

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

  3. Lettuce + lemontop 9% of all pairs
    Smell alikestrong
    Cooked together1,559 recipes

    Shared aroma: trans-2-hexenal (green, leafy).

  4. Lettuce + breadtop 15% of all pairs
    Smell alikemoderate
    Cooked together602 recipes

    Shared aroma: nonanal (fat, citrus).

  5. Pepper + breadtop 16% of all pairs
    Smell alikemoderate
    Cooked together20,964 recipes

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

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

What each ingredient does

Sardines
Provide the rich, savory fish base that forms the filling.
Lettuce
Adds a fresh, crisp texture in small pieces against the soft filling.
Lemon juice
Adds acidity that brightens and balances the oily richness of the fish.

The step that matters

Pound the sardines into a paste. Pounding breaks the fish and any softened bones into a uniform mass that spreads evenly. Leaving lumps or uneven pieces makes the filling hard to spread and gives inconsistent texture in each bite.

Swap the lettuce

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

  1. Capsicumfits better
  2. Spinachfits better
  3. Tomatofits better
  4. Lettucethe original

Fit is the average pairing score against pepper, bread, lemon. 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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