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Gwalia Toast

A toast topped with marrow bone pieces seasoned with lemon, salt, onion, and parsley.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Lemon and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,037 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Gwalia Toast

Ingredients

Directions

Prepare the marrow

  1. Split the marrow bone and remove the marrow, cutting it into 1-inch pieces.

  2. Wash the marrow pieces in cold water to remove any splinters.

Make the topping

  1. In a bowl, combine lemon juice, coarse sea salt, and onion juice, then place the bowl in a saucepan of hot water.

  2. Prepare the minced parsley and thin buttered toast.

  3. Drop the marrow pieces into boiling salted water and boil for 2 minutes.

  4. Skim the marrow out and add it to the seasoning bowl with parsley, mixing carefully.

Serve

  1. Spread the mixture on the toast and serve hot.

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. Lemon + parsleytop 1% of all pairs
    Smell alikestrong
    Cooked together14,037 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  2. Onion + parsleytop 9% of all pairs
    Smell alikemoderate
    Cooked together25,843 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  3. Lemon + oniontop 19% of all pairs
    Smell alikemoderate
    Cooked together15,646 recipes

    Shared aroma: decanal (soap, orange peel).

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

What each ingredient does

Marrow
Provides the rich, fatty body of the topping that carries the seasonings.
Lemon juice
Adds acidity that brightens the rich marrow.
Onion juice
Adds a sharp, savoury aroma to the seasoning.

The step that matters

Boiling the marrow for 2 minutes. Boiling only briefly firms the marrow enough to handle and spread while keeping it soft and rich. Boiling longer would melt out the fat and leave the topping greasy and loose.

Swap the onion

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

  1. Shallotfits better
  2. Carrotfits better
  3. Kalefits better
  4. Onionthe original

Fit is the average pairing score against lemon, parsley. 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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