Roasted Peppers and Onions Recipe Easy and Delicious Ideas

Updated On: October 15, 2025

Roasted peppers and onions are a classic combination that brings out the natural sweetness and depth of these vibrant vegetables. Whether you’re preparing a simple side dish for a family dinner or looking for a flavorful topping for sandwiches, salads, or pizzas, this recipe is incredibly versatile and easy to master.

The roasting process caramelizes the sugars in the peppers and onions, creating a rich, smoky flavor that elevates any meal. Plus, it’s a healthy way to add color and nutrition to your plate without much fuss.

In just a short time, you’ll have a delicious batch of roasted peppers and onions that can be enjoyed warm or cold, making it an excellent prep-ahead option for busy weeknights.

This recipe is perfect for both beginners and seasoned cooks. With minimal ingredients and straightforward steps, you can achieve restaurant-quality results at home.

Let’s dive into the details so you can bring this flavorful, aromatic dish to your table today!

Why You’ll Love This Recipe

Roasted peppers and onions are a fantastic addition to many dishes because they offer a perfect balance of sweetness and smokiness. The roasting intensifies their natural flavors, making them much more delicious than raw or simply sautéed versions.

This recipe is:

  • Simple to prepare: Just chop, season, and roast – no complicated techniques required.
  • Versatile: Use them as a side dish, sandwich filler, topping for pasta, or ingredient in wraps and salads.
  • Healthy: Low in calories and high in vitamins, especially vitamins A and C from the peppers.
  • Make-ahead friendly: Roast a big batch and keep leftovers in the fridge for quick meals throughout the week.

Plus, it pairs beautifully with many other recipes on our site, such as our Afghan Vegetarian Pulao Recipe Easy and Delicious Guide and the refreshing Baby Spinach Salad Recipe Vegan: Fresh & Easy Ideas.

Ingredients

  • 3 large bell peppers (any color, or a mix: red, yellow, orange, green)
  • 2 medium yellow onions, peeled and sliced into rings or strips
  • 3 tablespoons olive oil
  • 1 teaspoon sea salt
  • ½ teaspoon freshly ground black pepper
  • 1 teaspoon dried oregano (optional, for an herby flavor)
  • 2 cloves garlic, minced (optional)
  • 1 tablespoon balsamic vinegar (optional, for a tangy finish)

Equipment

  • Baking sheet or roasting pan
  • Parchment paper or silicone baking mat (for easy cleanup)
  • Chef’s knife for chopping
  • Cutting board
  • Mixing bowl to toss the vegetables
  • Spatula or tongs for turning the vegetables
  • Oven preheated to 425°F (220°C)

Instructions

  1. Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper or a silicone baking mat for easy cleaning.
  2. Prepare the vegetables: Wash the bell peppers and slice them into strips about ½ inch thick. Peel the onions and slice into similar-sized rings or strips to ensure even roasting.
  3. Combine in a mixing bowl: Add the sliced peppers and onions. Drizzle with the olive oil and toss well to coat evenly.
  4. Season: Sprinkle the sea salt, black pepper, and dried oregano over the vegetables. Add minced garlic if using. Toss again to distribute the seasonings thoroughly.
  5. Spread evenly: Arrange the seasoned peppers and onions in a single layer on the prepared baking sheet. Avoid overcrowding to ensure they roast rather than steam.
  6. Roast in the oven: Place the baking sheet in the oven and roast for 25-30 minutes. Halfway through (around 15 minutes), use a spatula or tongs to stir and turn the vegetables for even caramelization.
  7. Check for doneness: The peppers and onions should be tender, slightly charred at the edges, and fragrant. If you prefer deeper caramelization, roast for an additional 5 minutes, watching carefully to avoid burning.
  8. Optional step: Remove from oven and drizzle with balsamic vinegar for a tangy depth. Toss gently to combine.
  9. Serve warm or at room temperature. Enjoy as a side dish or use in your favorite recipes.

Tips & Variations

“To get the best caramelization, make sure to give the peppers and onions enough space on the baking sheet. Overcrowding leads to steaming, which makes the veggies less crispy and flavorful.”

  • Use a broiler: For extra charred edges, switch to broil for the last 2-3 minutes, but watch carefully to prevent burning.
  • Add other vegetables: Try including sliced zucchini, mushrooms, or cherry tomatoes for a roasted veggie medley.
  • Spice it up: Add a pinch of smoked paprika or chili flakes for a smoky, spicy kick.
  • Use fresh herbs: Sprinkle chopped fresh basil or parsley after roasting for a fresh herbal note.
  • Make it vegan-friendly: This recipe is naturally vegan and gluten-free, perfect for plant-based diets.

Nutrition Facts

Nutrient Amount per Serving (1/4 of recipe)
Calories 90 kcal
Fat 7 g (mostly healthy monounsaturated fats)
Carbohydrates 8 g
Fiber 2 g
Sugar 5 g (natural sugars from vegetables)
Protein 1 g
Vitamin A 150% DV
Vitamin C 120% DV
Sodium 300 mg

Serving Suggestions

Roasted peppers and onions are incredibly versatile and can complement a wide variety of dishes. Here are some ideas to inspire you:

Conclusion

Roasted peppers and onions are a simple yet flavorful addition to your meal repertoire. This recipe is perfect for anyone looking to add a touch of sweetness and smokiness to their dishes without a lot of effort.

With just a handful of ingredients and an oven, you can create a dish that’s both nutritious and delicious. Whether you’re preparing a quick weeknight side or enhancing your favorite recipes, these roasted veggies are sure to become a staple in your kitchen.

Don’t forget to explore more delicious and healthy recipes on our site, such as the Vegan Potato Corn Chowder Recipe for Cozy Comfort Food and the 400 Calorie Vegetarian Dinner Recipe Ideas for Healthy Meals.

Happy cooking!

📖 Recipe Card: Roasted Peppers and Onions

Description: A simple and flavorful side dish featuring sweet roasted peppers and caramelized onions. Perfect as a topping or a complement to any meal.

Prep Time: PT10M
Cook Time: PT30M
Total Time: PT40M

Servings: 4 servings

Ingredients

  • 3 large bell peppers (red, yellow, or orange), sliced
  • 2 medium onions, thinly sliced
  • 2 tablespoons olive oil
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1 teaspoon dried oregano
  • 1/2 teaspoon garlic powder
  • 1 tablespoon balsamic vinegar
  • Fresh parsley for garnish (optional)

Instructions

  1. Preheat oven to 425°F (220°C).
  2. In a large bowl, toss sliced peppers and onions with olive oil, salt, pepper, oregano, and garlic powder.
  3. Spread the vegetables evenly on a baking sheet.
  4. Roast for 25-30 minutes, stirring halfway through, until vegetables are tender and slightly caramelized.
  5. Remove from oven and drizzle with balsamic vinegar.
  6. Garnish with fresh parsley if desired and serve warm.

Nutrition: Calories: 120 kcal | Protein: 2 g | Fat: 7 g | Carbs: 14 g

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Photo of author

Marta K

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