Why it works: Parsley and lemon 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 ↓
Potatoes a LA Lyonnaise
Ingredients
Directions
Prepare
Shred the cold potatoes.
In a frying pan, melt the butter and add the sliced onions.
Fry the onions until soft, then add the shredded potatoes.
Fry the potatoes until brown.
Season and finish
Add the boiled rice, parsley, pepper, salt, and lemon juice.
Mix everything together and fry for a few more minutes.
Serve hot.
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.
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Parsley + lemontop 1% of all pairsSmell alikestrongCooked together14,037 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + parsleytop 5% of all pairsSmell alikemoderateCooked together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter
- Adds fat that fries the onions and potatoes and carries flavour.
- Onions
- Soften and sweeten as they fry, adding savoury depth to the dish.
- Potatoes
- Form the main body of the dish and brown into crisp golden pieces.
- Boiled rice
- Very dry rice helps bind the potatoes and absorb moisture so they fry crisply.
The step that matters
Fry the potatoes until brown. Shredded potatoes need enough heat and time to brown and crisp rather than steam. Wet or underheated potatoes stay soft and pale, so the cake will not hold together well.
Swap the onion
How well each one fits the dish's main ingredients (butter, potato, rice, parsley, pepper, lemon):
- Carrotfits better
- Asparagusfits better
- Okrafits better
- Onionthe original
Fit is the average pairing score against butter, potato, rice, parsley, pepper, 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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