Description

Roasted Onion is a simple yet flavorful dish that transforms ordinary onions into sweet, caramelized gems. This easy-to-make recipe requires minimal ingredients and oven time, unlocking natural sweetness and depth that complement any meal. Perfect as a side, topping, or ingredient, roasted onions bring warmth, versatility, and wholesome goodness to your dinner table.

Ingredients

Scale

Main Ingredients

3–4 medium to large onions (yellow, white, or red)
2–3 tablespoons extra virgin olive oil
1 teaspoon salt
½ teaspoon black pepper

Optional Ingredients

Fresh herbs (thyme, rosemary, parsley) – 1-2 teaspoons, chopped
1 tablespoon balsamic vinegar or juice of half a lemon
Optional additions for variations:
- ¼ teaspoon smoked paprika or chili flakes (for sweet and spicy)
- 2 tablespoons grated Parmesan or crumbled feta cheese (for cheesy finish)
- 1 tablespoon maple syrup or agave syrup (for vegan glaze)
- 2–3 minced garlic cloves (for garlic lover’s style)
- Fresh sage or oregano leaves – 1-2 teaspoons, chopped (for herb-infused)

Instructions

Preheat and prepare your oven: Set the oven to 400°F (200°C) and line a baking sheet with parchment paper or lightly grease it to prevent sticking.
Slice the onions: Peel the onions and cut them into halves or thick wedges, keeping the pieces large to maintain a tender interior with caramelized edges.
Toss with olive oil and seasonings: In a large bowl, gently toss the onion pieces with olive oil, salt, pepper, and any optional herbs or spices until every piece is lightly coated.
Arrange and roast: Spread the onions in a single layer on the baking sheet, cut side down for maximum caramelization. Roast for 30-40 minutes, flipping once halfway through for even browning.
Finish and serve: Remove onions once they are soft with golden, crispy edges. Drizzle with balsamic vinegar or lemon juice for a tangy twist before serving.

Notes

Yellow onions roast best due to their natural sugars and balanced flavor.
Cut onions into similar sizes to ensure even cooking.
Avoid overcrowding the baking sheet to promote caramelization.
Flip the onions halfway through roasting for even color on both sides.
For extra crisp edges, use a preheated baking stone or cast iron pan.
Keep an eye on the onions during the last 10 minutes to prevent burning.

Prep Time: 10 minutes
Cook Time: 30-40 minutes
Category: Appetizers
Method: Baking

Nutrition

Serving Size: 1/4 of recipe
Calories: 80
Sugar: 6g
Sodium: 300mg
Fat: 7g
Saturated Fat: 1g
Unsaturated Fat: 6g
Trans Fat: 0g
Carbohydrates: 9g
Fiber: 1.5g
Protein: 1g
Cholesterol: 0mg

Keywords: roasted onions, caramelized onions, side dish, easy recipe, gluten free, vegan option, healthy onions