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Roast Loin of Mutton

A roasted mutton loin served with stewed onions and mashed potatoes.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Roast Loin of Mutton

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. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare

  1. Preheat the oven to 350°F (175°C).

  2. Season the loin of mutton with salt and pepper.

Roast and serve

  1. Place the mutton in a roasting pan and roast for about 1.5 to 2 hours, or until cooked to your liking.

  2. In the last 30 minutes, add the stewed onions to the pan.

  3. Serve with mashed potatoes.

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 + potatotop 3% of all pairs
    Smell alikemoderate
    Cooked together9,023 recipes

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

  2. Mutton + oniontop 18% of all pairs
    Smell alikelow
    Cooked together4,531 recipes

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

  3. Mutton + potatotop 19% of all pairs
    Smell alikemoderate
    Cooked together293 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

Loin of mutton
Forms the main meat; roasting firms its proteins and browns the surface while the interior stays tender.
Stewed onions
Add sweetness and moisture, softening further as they cook in the pan juices.
Mashed potatoes
Serve as a soft starchy side that soaks up the meat juices and balances the rich roast.

The step that matters

Checking doneness of the roast. Mutton is easy to overcook, which dries the lean meat. Cooking to a target internal temperature rather than relying only on time gives a more reliable result.

Swap the potato

How well each one fits the dish's main ingredients (mutton, onion):

  1. Leekfits about as well
  2. Potatothe original
  3. Turnipfits less well
  4. Chivefits less well

Fit is the average pairing score against mutton, onion. 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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