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Simple Oven Roasted Onions

An easy and delicious side dish, oven roasted onions become sweet and soft while adding rich flavor to various meals.
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Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 4 servings
Course: Side Dish
Cuisine: American
Calories: 150
Ingredients Method Notes

Ingredients
  

Onions
  • 2 medium red onions
  • 1 medium sweet yellow onion
Dressing
  • 1/4 cup extra virgin olive oil
  • 1 large lemon, juiced
  • 1 teaspoon Dijon mustard
  • 3 cloves garlic, minced
  • 2 sprigs fresh rosemary, chopped
  • 1 teaspoon kosher salt
  • 1/2 teaspoon freshly ground black pepper

Method
 

Preparation
  1. Preheat oven to 400 degrees F.
  2. Trim both the root and stem sides of the onions, leaving the root intact.
  3. Peel onions and cut them into wedges.
Dressing
  1. In a medium bowl, combine olive oil, lemon juice, mustard, garlic, rosemary, salt, and pepper, whisking until well combined.
  2. Pour the dressing over the onions and toss well.
Roasting
  1. Place the onions on a baking pan.
  2. Bake for 30 to 45 minutes, until tender and browned, tossing once during cooking.
  3. Remove from the oven, toss again, and transfer to a serving bowl.
Serving
  1. Serve hot or warm, alongside roasted meats or on top of grains.

Notes

For a stronger lemon flavor, add more lemon juice. If you don't have Dijon mustard, you can use yellow mustard instead, but it will alter the taste. Leftover roasted onions can be stored in the fridge for up to 4 days.