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Home / Recipes / Sauces & Dressings Recipes

Oven Roasted Peppers And Onions

Modified: Jun 5, 2025 · Published: Apr 28, 2022 by Sujatha Muralidhar · This post may contain affiliate links · 8 Comments

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OVEN ROASTED PEPPERS AND ONIONS

This Oven-Roasted Peppers And Onions recipe is ready in less than 25 minutes; welcome to the world of simple base recipes. It's a versatile dish, and the options for using it are endless, including topping or seasoning.

Oven roasted peppers and onions on a plate

I love this oven-roasted peppers and onions recipe for adding vibrant colors and bold flavors to any meal. To make dinner-prepping work more straightforward, I often store it in large batches for the following days.

With simple, easy-to-find ingredients, these roasted peppers and onions come together effortlessly in just a few steps(looking for a snacking recipe? Try these roasted mini peppers)!

So, next time, if you are looking for an easy and quick way to add some depth of flavor, this recipe is the keeper. 

Jump to:
  • Why You'll Love This Recipe?
  • Ingredients 
  • How To Make Oven Roasted Peppers And Onions?
  • How To Use
  • ♨️How To Adjust The Heat?
  • Storage & Reheating
  • FAQ
  • More Recipes To Try
  • 📖 Recipe

Why You'll Love This Recipe?

⭐️It tastes delicious, crisp outside, and moist inside.

⭐️It's a great add-on condiment for tacos or sandwiches.

⭐️It is quick and effortless and stores well, too.

Ingredients 

  • Bell pepper: Add multicolored bell peppers, such as yellow, orange, green, and red. This blend is pleasing to the eyes and adds value to the food. I have used just the bell peppers; feel free to use other mild chili pepper varieties, like banana and poblano pepper.
  • Onion: I've used red onions; yellow onions work great, too.
  • Grape seed oil is one of my reliable options for providing extra deliciousness and wholesome flavor. You can also swap it for olive oil.
  • Apple cider vinegar: Infusing the bell pepper slices with apple cider vinegar adds up mild acidity.
  • Red pepper flakes: I highly recommend using this. It gives the bell peppers a minimal kick without being overly spicy.
Close-up of colorful roasted peppers and onions with a spoon

How To Make Oven Roasted Peppers And Onions?

  • Preheat the oven to 400°F. 
  • Cut the bell pepper length twice and remove the core.
  • Slice the peppers and onion thinly a quarter inch in thickness.
  • Add these sliced bell peppers, onion, grape seed, oil, apple cider vinegar, red pepper flakes, and salt in a mixing bowl.
  • Gently toss until the seasonings coat the bell peppers.
  • Bake for about 20 minutes or until the edges shrink and turn golden brown.
  • Serve as a topping for burgers or tacos. Or serve as a side dish and enjoy!!

How To Use

  • Topping. Make your pizza or taco more delightful by adding a layer of roasted bell peppers.
  • Side dish. Serve as a complete side dish for any main courses.
  • Garnish. Spread layer over salad or the meat dishes.
  • Seasoning. It's a great addition that will work incredibly with pasta, chilies, or salsa.

♨️How To Adjust The Heat?

The bell peppers have no heat, while red pepper flakes add intense spiciness to this recipe.

The heat level depends on the amount of red pepper flakes you use. So, you can adjust the flakes in this recipe based on my heat tolerance.

Golden brown roasted peppers and onions fresh out of the oven

Storage & Reheating

You can store leftover oven-roasted onions and peppers in an airtight container in the refrigerator for up to four days. Or transfer them to freezer-safe containers or bags and freeze them for up to three months.

To reheat, thaw them by gently placing them in the refrigerator overnight or using the microwave. Then reheat in the oven at 300°F or in the microwave.

FAQ

What other variations to try?

Add Italian seasoning and olive oil for a flavorful pizza topping, or toss with pasta for a fresh twist.

Is it necessary to use apple cider vinegar?

Apple cider vinegar adds a tangy depth to this dish but is optional. If you prefer milder flavors, you can swap lime juice or simple white vinegar.

How do I know when the peppers and onions are done?

The peppers and onions are done roasting when they start wilting and turning brown on the edges. This usually takes 20 minutes at 400°F. You can toss halfway through for even cooking. They burn quickly, so keep an eye on them during the final cooking stages.

What other vegetables can I roast along with the peppers and onions?

You can try mushrooms, zucchini, asparagus, eggplant, broccoli, and cauliflower, and check this spicy roasted vegetables recipe for more ideas.

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If you enjoyed this recipe, please consider leaving a ⭐ star rating and let me know your thoughts in the 📝 comments section below the recipe.

📖 Recipe

This oven roasted peppers and onions recipe is ready in less than 25 minutes. It's a versatile dish to serve as a topping or as a side dish.

Oven Roasted Peppers And Onions

This oven roasted peppers and onions recipe is ready in less than 25 minutes. It's a versatile dish to serve as a topping or as a side dish.
5 from 3 votes
Print Pin Rate
Prep Time: 5 minutes minutes
Cook Time: 10 minutes minutes
Servings: 4 Servings
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Ingredients

  • 1 Red bell pepper
  • 1 orange bell pepper
  • 1 yellow bell pepper
  • 1 onion large
  • 1 tablespoon grape seed oil / olive oil
  • 1 tablespoon apple cider vinegar optional
  • 1 teaspoon red pepper flakes
  • ¼ teaspoon salt

Instructions

  1. Preheat the oven to 400 degrees F.
  2. Slice the peppers
  3. Cut the pepper into two lengthwise.
  4. Carefully remove the core.
  5. And cut the pepper into thin strips of ¼ inch in thickness.
  6. In a mixing bowl, add the pepper strips, olive oil, apple cider vinegar, red pepper flakes, and salt.
  7. And toss until the seasonings coat the pepper strips evenly.
  8. And bake for about 20 minutes or until the edges shrink and turn golden brown.
  9. Serve as a topping for burger, or in the taco.

Notes

  • Adjust the amount of red pepper flakes according to your spice preference in this recipe.
  • Store the leftover oven-roasted peppers and onion in an airtight container in the fridge for up to 4 days or frozen in freezer-safe containers for up to 3 months.
  • Reheat in the oven at 300°F or microwave after thawing in the fridge overnight or using the microwave.

Nutrition

Calories: 68kcal | Carbohydrates: 8g | Protein: 1g | Fat: 4g | Saturated Fat: 0.4g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 1g | Sodium: 158mg | Potassium: 241mg | Fiber: 2g | Sugar: 4g | Vitamin A: 2071IU | Vitamin C: 133mg | Calcium: 16mg | Iron: 1mg

Additional Info

Course Appetizer, Side Dish
Cuisine American, Mexican
Author Sujatha Muralidhar
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Comments

    5 from 3 votes

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    Recipe Rating




  1. Caroline says

    April 23, 2023 at 1:19 pm

    Love that these are roasted for extra flavor and hands off cooking - so versatile, too.

    Reply
    • pepperbowl says

      June 13, 2024 at 1:33 pm

      I’m so happy that it was a hit, Caroline!

      Reply
      • Roel says

        September 03, 2024 at 2:18 am

        This is really new to me and the timing is great coz Im really chaging my diet for good.

        Thank you for sharing your recipes.

        Reply
        • Sujatha Muralidhar says

          September 03, 2024 at 2:04 pm

          Thank you! I'm happy the timing worked out, and I hope our recipes help with your new diet.

          Reply
  2. Janie says

    April 23, 2023 at 1:58 pm

    I love using this over bake chicken! Its quite easy to make and the flavors are delicious!

    Reply
    • suja md says

      June 13, 2024 at 1:32 pm

      AMAZING! Thank you Janie!

      Reply
  3. Leora says

    September 07, 2025 at 1:34 pm

    This recipe is very quick, easy, and delicious! I love that I didn’t have to constantly be stirring it on the stove top or worrying about them burning on the grill. Turned out great!

    Reply
    • Sujatha Muralidhar says

      September 09, 2025 at 6:02 am

      Yay! So happy to hear Leora. I love simple and stress-free cooking too.

      Reply
The author image of the food blog pepperbowl.com

Hi, I'm Suja! I'm the person behind PEPPER BOWL, based in Pennsylvania. I focus on easy, simple-to-make recipes inspired by rich flavors with a hint of heat. I enjoy simplifying recipes with minimal ingredients to suit today's busy lifestyle.

More about me →

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