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Home » Recipes » Side Dishes

Easy Roasted Peppers and Onions

By Laura Fuentes Updated Jun 6, 2025

5 from 16 votes

Recipe

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Tender roasted peppers and onions with golden brown edges. They make a delicious and healthy topping for salads, wraps, fajitas, and more! 

As simple as it is to make, these roasted bell peppers and onions make a colorful and completely healthy addition to any meal.

overhead view of skillet filled with chicken strips and roasted peppers and onions

Roasted Onions and Bell Peppers

I first made roasted peppers and onions for the sheet pan shrimp fajita tacos while writing the Taco Tuesday Cookbook. They were a hit and one of my family’s favorite taco recipes. For them, roasting the veggies enhanced their flavors and made a delicious addition to the shrimp, and I couldn’t agree more. 

Seasoning peppers and onions

You can use any seasonings you like: paprika, garlic powder, oregano, Italian seasoning, you name it! My go-to for roasted peppers and onions is homemade taco seasoning or plain ole salt and pepper.

You’ll also want to make sure you are using an oil with a high smoking point, such as olive oil, avocado oil, and canola oil. These oils can handle high temperatures without setting off the smoke alarms.

Laura standing in kitchen cutting red bell peppers into slices

How to Roast Peppers and Onions in the Oven

To get the perfect veggies with a little crisp on their edges, you’ll want to slice them the same size. Onions tend to cook faster than peppers, so if you prefer them tender and less crispy, slice them a little thicker. 

Once you slice and season the bell peppers and onions, roast them for 20 minutes until they are tender and golden brown.

What Temperature to Roast Peppers and Onions

As for all vegetables, the best roasting temperature is 400F. It’s high enough to give them a golden brown exterior while keeping them tender. You can always bump up the temperature to 425F MAX, but be sure to keep an eye on them around the 20-minute mark.

skillet with chicken strips and roasted peppers and onions

Serving Oven-Roasted Pepper and Onion Strips

Oven-roasted peppers and onions can be used just like roasted vegetables. Over salads, inside wraps, on pizza, or to make chicken fajitas.

I find them particularly delicious on a sausage and pepper sub or over a bowl of greens with a fried egg, but I’ll let you do the deciding. 

Roasted Peppers and Onions

Servings: 4 cups
Prep Time: 5 minutes mins
Cook Time: 30 minutes mins
Tender roasted peppers and onions with golden brown edges. They make a delicious and healthy topping for salads, wraps, fajitas, and more! 
5 from 16 votes
Print Pin

Ingredients

  • 1 yellow bell pepper, seeded and thinly sliced
  • 1 red bell pepper, seeded and thinly sliced
  • 1 orange bell pepper, seeded and thinly sliced
  • 1 small red onion, thinly sliced
  • 1 to 2 tablespoons olive oil
  • 1 teaspoon salt
  • 1 teaspoon seasoning of choice, I used taco seasoning

Instructions

Prep:

  • Preheat the oven to 400F.
  • Add the veggies to a large baking sheet, toss with the olive oil and seasonings. Space the veggies evenly out, in a single layer. 

Bake:

  • Bake for 20 minutes, before carefully give the veggies a toss. Roast for another 10 minutes or until tender and golden brown. 

Equipment

sheet pan with lid cover
sheet pan with cover
the taco tuesday cookbook
The Taco Tuesday Cookbook
Sheet Pan Dividers

Nutrition

Serving: 1 cup | Calories: 65kcal | Carbohydrates: 8g | Protein: 1g | Fat: 4g | Saturated Fat: 1g | Polyunsaturated Fat: 0.5g | Monounsaturated Fat: 3g | Sodium: 588mg | Potassium: 229mg | Fiber: 2g | Sugar: 4g | Vitamin A: 1925IU | Vitamin C: 133mg | Calcium: 14mg | Iron: 0.5mg

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Comments

    5 from 16 votes (11 ratings without comment)

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    Recipe Rating




  1. Ieva says

    May 21, 2024 at 12:34 am

    5 stars
    SImple yet lovely! We tried it with fajitas and as a side dish to pork chops too!

    Reply
  2. veenaazmanov says

    May 20, 2024 at 8:11 pm

    5 stars
    I would love this combination with my Cheesy mashed potatoes Bowl or as a sandwich topping any day. Definitely yummy.

    Reply
  3. Lauren says

    May 20, 2024 at 7:50 pm

    5 stars
    These roasted peppers and onions were perfect for the sausage sandwiches I made for dinner tonight – delicious, easy recipe – thanks!

    Reply
  4. Gianne says

    May 20, 2024 at 5:31 pm

    5 stars
    It was so simple to make and the flavors were amazing. The peppers and onions were perfectly tender and caramelized. I will definitely be making this again!

    Reply
  5. Erik says

    May 20, 2024 at 5:12 pm

    5 stars
    Wonderfully easy to follow recipe. Gonna use this to make a sausage and peppers sandwich now!

    Reply

Hi! I'm Laura.
Certified Integrative Nutrition Health Coach, mom of three, and the woman behind the world’s best pancakes—here to help you ditch the mealtime drama with recipes your family will actually eat.

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