Why it works: Onion and garlic match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 29,030 recipes mention both. Both carry furaneol, which smells caramel, strawberry. The science ↓
The recipe
8 servingsIngredients
Contains: egg, milk (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.
Preheat the oven to 375°F (190°C). Boil the zucchini halves in a pan of boiling water for 3 minutes, drain, and let cool. Scoop out the centers, leaving shells about 1/4 inch thick, and finely chop the scooped flesh.
Brush the zucchini shells inside with half of the melted butter and arrange them cut side up in a baking dish.
Melt the remaining butter in a skillet over medium heat. Cook the onion for 4 minutes, then add the chopped zucchini flesh and garlic and cook 3 minutes more.
Stir in the drained spinach, parsley, salt, basil, oregano, and black pepper. Cook 2 minutes to dry the mixture, then remove from heat and let cool slightly.
Stir the ricotta, beaten eggs, and Parmesan into the spinach mixture until evenly combined.
Mound the ricotta filling into the zucchini shells. Spoon the tomato sauce into the bottom of the baking dish around the shells.
Bake for 20 minutes until the filling is set and reaches 160°F (71°C) in the center and the shells are tender.
Let rest 5 minutes before serving.
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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Onion + garlictop 1% of all pairsAroma overlapstrongMentioned together29,030 recipes
Shared aroma: furaneol (caramel, strawberry).
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Garlic + spinachtop 3% of all pairsAroma overlapmoderateMentioned together2,433 recipes
Shared aroma: 1-hexanol (resin, flower).
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Spinach + ricotta cheesetop 3% of all pairsAroma overlapstrongMentioned together250 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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Butter + parmesan cheesetop 3% of all pairsAroma overlapstrongMentioned together4,158 recipes
Shared aroma: guaiacol (smoky, sweet).
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Garlic + parsleytop 4% of all pairsAroma overlapmoderateMentioned together9,294 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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 (butter, garlic, spinach, ricotta cheese, egg, parmesan cheese, parsley):
- Chivebetter flavor fit
- Potatobetter flavor fit
- Tomatobetter flavor fit
- Onionthe original
Fit is the average pairing score against butter, garlic, spinach, ricotta cheese, egg, parmesan cheese, parsley. 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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