Roasted Onions

Why You’ll Love This Recipe

Roasted onions are a simple yet flavorful side dish that transforms the humble onion into a caramelized, tender delight. With just a few ingredients and minimal prep, these onions develop a rich, sweet flavor and golden-brown edges that pair beautifully with meats, vegetables, or grains. They’re perfect for enhancing salads, sandwiches, or enjoyed on their own.

ingredients

this Recipe

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

yellow or red onionsolive oilsaltblack pepperfresh thyme or rosemary (optional)balsamic vinegar or lemon juice (optional for finishing)

directions

Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.

Peel the onions and slice them into halves or thick wedges, depending on preference.

Place the onion pieces in a large bowl and drizzle with olive oil. Toss to coat evenly.

Season with salt, black pepper, and herbs if using.

Arrange the onions cut-side down on the baking sheet, spacing them out to avoid overcrowding.

Roast in the oven for 35-45 minutes, flipping halfway through, until golden brown and tender.

If desired, drizzle with balsamic vinegar or lemon juice before serving for added brightness.

Servings and timing

This recipe yields approximately 4 servings.Preparation time: 10 minutesRoasting time: 35-45 minutesTotal time: 45-55 minutes

Variations

Use pearl onions or shallots for a different texture and presentation.

Add garlic cloves to the baking sheet for a more robust flavor.

Sprinkle with parmesan or crumbled feta before serving.

Toss with a splash of white wine before roasting for extra depth.

Mix with roasted carrots or beets for a colorful side.

storage/reheating

Store roasted onions in an airtight container in the refrigerator for up to 5 days.To reheat, warm in a skillet over medium heat or in a 350°F (175°C) oven until heated through.They can also be enjoyed cold in salads or sandwiches.

FAQs

Can I use any type of onion?

Yes, yellow, white, red, or sweet onions all work well—each offers a slightly different flavor.

Do I need to peel the onions first?

Yes, always peel off the papery outer layers before roasting.

Why are my onions burning?

Make sure they are well-coated in oil and spaced apart on the baking sheet to prevent burning.

Can I roast them whole?

Yes, but roasting time will be longer—up to 1 hour or more depending on size.

Are roasted onions healthy?

Yes, they’re low in calories and rich in antioxidants, especially when prepared with minimal oil.

Can I make them ahead of time?

Absolutely—roasted onions can be made in advance and reheated as needed.

Should I cover the onions while roasting?

No, roasting uncovered allows them to caramelize and brown properly.

Do they freeze well?

Yes, roasted onions can be frozen for up to 2 months. Thaw and reheat before serving.

Are roasted onions sweet?

Yes, roasting enhances their natural sugars, resulting in a sweet, savory flavor.

Can I add spices?

Yes, try paprika, cumin, or chili flakes for extra flavor.

Conclusion

Roasted onions are an easy and delicious way to elevate any meal. Their caramelized flavor, tender texture, and versatility make them a staple side dish or flavor booster in countless recipes. Once you try them, they’ll likely become a regular addition to your kitchen repertoire.

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