Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 27,047 recipes mention both. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Sole Au Gratin
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat the oven to 350°F (175°C).
Parboil the shallot.
Chop the mushrooms finely.
Chop the lemon rind finely.
Clean the sole.
Make three cuts on the white skin of the sole.
Assemble and bake
Grease a baking dish.
Sprinkle some bread crumbs on the dish.
Sprinkle a little lemon juice on the dish.
Add the chopped lemon rind, mushrooms, and shallot on top of the dish.
Place the sole in the dish with the cuts facing down.
Sprinkle more mushrooms, lemon, and shallot on top of the fish.
Cover the fish with remaining bread crumbs.
Dot the crumbs with tiny pieces of butter.
Bake in the oven until nicely browned, about 20-30 minutes.
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 aroma chemistry they share, and how many recipes mention both.
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Lemon + peppertop 3% of all pairsAroma overlapstrongMentioned together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Shallot + mushroomtop 4% of all pairsAroma overlapmoderateMentioned together1,982 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Shallot + lemontop 6% of all pairsAroma overlapstrongMentioned together2,523 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Bread + buttertop 7% of all pairsAroma overlapmoderateMentioned together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Mushroom + buttertop 7% of all pairsAroma overlapmoderateMentioned together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Sole
- Forms the main body of the dish; its flesh cooks through gently under the crumb topping.
- Bread crumbs
- Form a crisp, golden topping that browns in the oven and helps hold moisture in.
- Mushrooms
- Add savoury, earthy flavour and moisture as they release juices into the dish.
- Butter
- Adds fat that helps the crumb topping brown and adds richness.
- Lemon
- Adds acidity and bright aroma that cut through the richness of the fish and butter.
The step that matters
Bake until nicely browned. Baking long enough lets the crumb topping brown and the fish cook through, while overbaking can dry out the delicate flesh of the sole.
“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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