Name: Roasted Red Onions
Prep time: 5 min
Cook time: 20 min
Total time: 20 min
Ingredients: 2 red onions; 2 tbsp olive oil or coconut oil; kosher salt & black pepper

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Easy roasted red onions are the perfect way to meal prep. Bake in the oven for use in your favorite lunch bowl, as a taco topping, or as a standalone side dish. This roasted red onion recipe is easy to reheat and can be served warmed, chilled, or at room temperature.

Please read the entire post for tips and tricks to ensure a perfect recipe every time. And don't forget to tag @peelwithzeal on Instagram so we can admire your creation!

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We have been on a roasting streak in the Peel house lately. Maybe it is the colder than normal weather. You can check out our most recent slow-roasted tomatoes and our roasted garlic to see what I am talking about. Serious goodness!

If you find raw red onions too harsh then these oven roasted red onions are for you. Roasting the red onions removes the spiciness allowing the sweetness to shine.

How to Make Perfectly Roasted Red Onions

This is a very simple and straightforward recipe. Roasted onions are easy to make in the oven using a neutral oil like olive or filtered coconut and salt and pepper. But you can add additional seasonings like lemon zest, hearty fresh herbs (we like thyme), or even spicy dried chilis.

Prep the Baking Sheet- Line a baking sheet with parchment paper to prevent sticking, you can also use foil. Alternately you can oil the baking sheet but if your onions are high in sugar they may still stick even with the oil making Clean up a pain.

Prep the Onions- Peel the papery layers off your onions. Your red onions should be sliced into ½ thick slices. Thinner sliced onions may cook faster, but they also get gummy so stick with the thicker slice. Layout the red onions on the baking sheet and lightly brush with oil and season with salt and pepper. Add any additional seasonings at this time.

Oven Bake- Start by preheating the oven to 400 F degrees. Roast until caramelized, about 15 to 20 minutes. Flip halfway through for even caramelization.

How to Make Balsamic Red Onions

This is a special variation of this recipe that we love to make but I didn't think it was different enough to warrant its own recipe and post.

To make balsamic and thyme roasted onions mix in the leaves of 4 fresh thyme sprigs (or 1/2 teaspoon of dried thyme) and 2 tablespoons of balsamic vinegar in with the 2 tablespoons of oil.

Brush (or drizzle) on the onions before baking. Flip halfway through the baking (stil 15 to 20 minutes total) and brush (or drizzle) on an additional 2 tablespoons of balsamic vinegar.

How to Use Roasted Onions

We use this roasted red onion recipe as a standalone side dish and in some of our favorite dishes.

On a roasted veggie sandwich, or really any sandwich
As a side dish, balsamic style
Chopped up with fresh herbs and mixed into cream cheese for a roasted red onion bagel spread
On top of a burger
On tacos, we really like these paired with our citrus shredded beef
Chopped and mixed with refried beans or cheese for vegetarian enchiladas
On a vegan antipasto platter

vegan antipasto platter with roasted onions

Let us know in the comments how you plan to serve your roasted red onions!

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5 from 7 votes