Name: Roasted Onions
Ingredients: 4 small Yellow onions Salt & pepper; 2 tbsp Olive oil

Why it works: Onion and olive are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 29,779 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

Roasted Onions

Oven400°F

Timeabout 1 hour

Ingredients

4 small Yellow onions Salt & pepper
2 tbsp Olive oil

Directions

Prepare

Preheat oven to 400°F.
Do not peel the onions.
Rub the outer skins well with the olive oil.

Bake and serve

Set them in an oiled baking pan, sprinkle with salt & pepper, and bake for about 1 hour until soft and golden.
Serve warm or at room temperature.
Use either as a side dish or as part of an antipasto.
Or toss with fresh herbs such as oregano and serve as part of a salad.

Nutrition, whole recipe (rough)

169Calories

1 gProtein

14 gFat

12 gCarbs

What these numbers assume: 4 portions

Ingredient	Portion assumed	kcal
Olive Oil	1 tbsp (14g)	119
Onion	1 medium (110g)	44
Black Pepper	1 tsp ground (2.3g)	6
Salt	1 tsp (6g)	0

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

Recipe from the Recipes Wiki (Fandom).

Steps grouped into stages for easier reading; the method is the source's own.

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.

Onion + olivetop 8% of all pairs

Smell alikemoderate

Cooked together29,779 recipes

Shared aroma: 2,4-decadienal (seaweed).
Onion + peppertop 11% of all pairs

Smell alikemoderate

Cooked together68,474 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Pepper + olivetop 11% of all pairs

Smell alikemoderate

Cooked together30,263 recipes

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Yellow onions: Become soft and sweet as they roast, with golden browning on the skins.
Olive oil: Coats the skins to promote even browning and helps keep the onions from drying out.