These roasted onions are caramelised and seasoned with garlic and herbs, creating a rich and aromatic side dish.
Why You’ll Love This Recipe
Caramelised edges and a tender interior make these roasted onions deeply flavorful. Simple seasoning enhances their natural sweetness, making them a versatile complement to many mains.
ingredients
large onions
olive oil
garlic cloves, minced
fresh herbs (such as thyme or rosemary)
salt
black pepper
butter (optional)
(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)
directions
- Preheat oven to moderate heat.
- Peel onions and slice into rounds.
- Arrange in a baking dish and drizzle with olive oil.
- Scatter minced garlic and herbs over the onions.
- Season with salt and pepper.
- Roast until tender and caramelised, turning once.
- Serve warm.
Servings and timing
Serves: 4
Preparation: 10 minutes
Roasting: 30–40 minutes
Total: 40–50 minutes
Variations
• Add balsamic vinegar for sweetness and acidity.
• Include root vegetables such as carrots or parsnips.
• Sprinkle Parmesan halfway through roasting.
storage/reheating
Store leftover onions in an airtight container in the refrigerator for up to three days. Reheat in the oven until warm.
FAQs
Why are roasted onions so sweet?
Slow roasting enhances their natural sugars.
Can I prepare this ahead?
Yes, roast ahead and reheat before serving.
What herbs work best?
Thyme, rosemary, or parsley pair well.
Should I cover the onions?
Roast uncovered for better caramelisation.
Are these gluten‑free?
Yes, naturally gluten‑free.
Do I need to peel onions?
Yes, peeling ensures even roasting.
Can I add spice?
Crushed red pepper flakes add heat.
Can I roast whole onions?
Yes, but adjust roasting time accordingly.
How do I prevent burning?
Stir occasionally and adjust oven temperature.
What main dishes pair well?
Grilled meats, roasted chicken, or fish.
Conclusion
These roasted onions are simple yet richly satisfying, elevating any meal with their sweet and aromatic character.
Print
Roasted Onions with Garlic and Herbs
- Prep Time: 10 minutes
- Cook Time: 40 minutes
- Total Time: 50 minutes
- Yield: 4 servings 1x
- Category: Side Dish
- Method: Roasting
- Cuisine: Mediterranean
- Diet: Vegan
Description
Roasted Onions with Garlic and Herbs is a simple yet flavorful side dish featuring tender, caramelized onions roasted with whole garlic cloves and aromatic herbs for a rich, savory addition to any meal.
Ingredients
- 4 medium onions (yellow, red, or a mix), peeled and quartered
- 6 garlic cloves, peeled
- 2 tbsp olive oil
- 1 tsp fresh thyme leaves (or 1/2 tsp dried thyme)
- 1 tsp fresh rosemary, chopped (or 1/2 tsp dried rosemary)
- Salt and freshly ground black pepper to taste
- Optional: balsamic vinegar drizzle for serving
Instructions
- Preheat oven to 400°F (200°C). Line a baking sheet or roasting pan with parchment paper or lightly grease it.
- Place the quartered onions and garlic cloves in a large bowl. Add olive oil, thyme, rosemary, salt, and pepper. Toss to coat evenly.
- Spread the mixture in a single layer on the prepared baking sheet.
- Roast for 35–40 minutes, turning once halfway through, until onions are golden and tender and garlic is soft.
- Optional: Drizzle with a little balsamic vinegar before serving for extra depth of flavor.
- Serve warm as a side dish or topping for meats, grains, or salads.
Notes
- Use a mix of onion varieties for color and flavor contrast.
- Leftovers can be added to sandwiches, omelets, or pureed into soups.
- Roasting mellows the sharpness of onions and brings out their natural sweetness.
- Double the garlic if you love a strong roasted garlic flavor.
Nutrition
- Serving Size: 1 serving
- Calories: 110
- Sugar: 6g
- Sodium: 70mg
- Fat: 7g
- Saturated Fat: 1g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 11g
- Fiber: 2g
- Protein: 1g
- Cholesterol: 0mg
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