Why it works: Lamb and sweet potato share more aroma than cooks usually use. They rank in the top 10% of all ingredient pairs, and 37 recipes mention both. Both carry 2,4-nonadienal, which smells fatty, green. The science ↓
The recipe
Ingredients
Directions
Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.
Heat the oven to 425°F (220°C). Toss the sliced sweet potatoes with 1 tablespoon of the olive oil and the rosemary leaves stripped from the sprig, or the dried rosemary. Spread on a large baking sheet.
Roast the sweet potatoes for about 15 minutes, until they start to soften and brown at the edges.
While the potatoes roast, heat the remaining 1 tablespoon olive oil in a large skillet over medium-high heat. Add the red onion and cook for 5 minutes, until softened.
Push the onion to one side of the skillet and add the lamb steaks. Cook for 3 to 4 minutes per side, until browned.
Spread the wholegrain mustard over the top of the steaks after turning them. Keep cooking until the thickest part reaches 145°F (63°C), about 1 to 2 more minutes per side.
Move the lamb to a plate and rest for 3 minutes. Add a splash of water to the skillet if needed and stir to loosen the pan juices.
Serve the lamb steaks with the roasted sweet potatoes and onions, spooning the pan juices over the top.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Lamb + sweet potatotop 10% of all pairsAroma overlapstrongMentioned together37 recipes
Shared aroma: 2,4-nonadienal (fatty, green).
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Olive + rosemarytop 3% of all pairsAroma overlapstrongMentioned together2,489 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Lamb + rosemarytop 4% of all pairsAroma overlapmoderateMentioned together396 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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Onion + mustardtop 4% of all pairsAroma overlapstrongMentioned together9,243 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Olive + lambtop 5% of all pairsAroma overlapstrongMentioned together1,391 recipes
Shared aroma: 2-undecenal (sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (olive, lamb, sweet potato, rosemary, mustard):
- Potatobetter flavor fit
- Tomatobetter flavor fit
- Capsicumbetter flavor fit
- Onionthe original
Fit is the average pairing score against olive, lamb, sweet potato, rosemary, mustard. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
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