As I poured the vibrant colors of bell peppers and onions into my bowl, a rush of excitement washed over me. This recipe for Roasted Peppers and Onions has become my go-to secret weapon in the kitchen, effortlessly transforming any meal with its delightful smoky flavor and stunning presentation. Whether you’re serving it as a side dish or tossing it into your favorite grain bowl, this simple, vegan recipe is not only quick to prepare but also freezer-friendly, making meal prep a breeze. In just 35 minutes, you’ll have a reliable dish that’s versatile enough for breakfast, lunch, or dinner. Who knew something so simple could elevate your dining experience? Ready to dive into this flavor adventure?

Why Choose Roasted Peppers and Onions?
Versatile Flavor Boost: This side dish adapts beautifully to various cuisines, complementing everything from Mediterranean wraps to hearty grilled meats.
Easy Preparation: With just a few simple steps and 35 minutes, you’ll have an impressive dish ready to enhance any meal.
Healthy and Nutritious: Packed with vitamins A and C, this dish promotes wellness while satisfying your taste buds.
Meal Prep Friendly: Prepare a batch ahead of time and enjoy roasted peppers and onions throughout the week, just like with my Meatloaf Mashed Potatoes or Chinese Beef Broccoli.
Colorful Presentation: The vibrant colors of the peppers create an inviting dish that’s as pleasing to the eye as it is to the palate.
Endless Variations: Feel free to mix in seasonal vegetables or whatever you have on hand for a unique twist every time!
Roasted Peppers and Onions Ingredients
Get ready to create this vibrant vegan side dish!
For the Vegetables
- Red Bell Pepper – Adds sweetness and color; substitute any bell pepper for a similar effect.
- Orange Bell Pepper – Provides a sweet, vibrant hue; any bell pepper can be swapped based on taste.
- Yellow Bell Pepper – Contributes mild flavor and a bright touch; consider using green for a touch of bitterness.
- Small Onion – Imparts depth and aroma when roasted; yellow or sweet onions are best for balance.
For the Roasting
- Avocado Oil – Ideal for roasting due to its high smoke point; olive oil works well too if preferred.
- Smoked Paprika – Adds a delightful smoky flavor; sweet paprika can provide a milder alternative.
- Oregano – Infuses herbal notes; Italian seasoning or thyme can be used for variation.
- Salt and Pepper – Enhances overall flavor; adjust the quantity to taste, and try salt alternatives for lower sodium.
Now you have everything you need to embark on your delicious journey with roasted peppers and onions!
Step‑by‑Step Instructions for Roasted Peppers and Onions
Step 1: Preheat Your Oven
Begin by preheating your oven to 400°F (200°C). This temperature is ideal for getting those beautiful caramelized edges on your veggies. While the oven warms up, gather your baking sheet and parchment paper to ensure effortless cleanup once your roasted peppers and onions are ready.
Step 2: Prepare Your Vegetables
Take your vibrant red, orange, and yellow bell peppers along with a small onion, and slice them into even pieces. Aim for uniform sizes to promote even roasting. The colors will brighten up your kitchen, and the sweet fragrance of fresh peppers will start filling the air, heightening your anticipation for this delicious dish.
Step 3: Arrange the Veggies on the Baking Sheet
Place the sliced peppers and onions onto your prepared baking sheet, ensuring they are spread out in an even layer. This allows for proper roasting without steaming. Their radiant colors mixed together create a visually appealing base for your Roasted Peppers and Onions dish, sparking excitement for the meal to come.
Step 4: Drizzle and Season
Generously drizzle the vegetables with avocado oil, then sprinkle with smoked paprika, oregano, salt, and pepper. Toss everything together using your hands or a spatula to ensure an even coating of oil and seasonings. This step is crucial to infusing the roasted peppers and onions with vibrant flavors while achieving that sought-after caramelization.
Step 5: Roast in the Oven
Once seasoned, place the baking sheet in the preheated oven and roast for 20 minutes. Be sure to watch for the vegetables to soften and begin to caramelize—this is your visual cue for the next step. The enticing aroma will begin to fill your kitchen, tempting your taste buds as you wait.
Step 6: Toss and Continue Roasting
After 20 minutes, take the baking sheet out of the oven and give the vegetables a gentle toss to ensure even cooking. Return them to the oven for an additional 10 minutes, allowing those delightful charred edges to develop and enhance the flavor profile of your Roasted Peppers and Onions. Keep an eye out for tender veggies with slight charring as the final indicator of their perfect doneness.

What to Serve with Roasted Peppers and Onions?
The perfect side dish beckons to be paired with bright flavors that elevate your meal experience.
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Creamy Mashed Potatoes: The silky texture complements the roasted vegetables beautifully, providing a comforting backdrop to their smoky flavors.
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Quinoa Salad: This light and nutty salad introduces a delightful crunch. Toss in some nuts or seeds for added texture and nutrition.
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Grilled Chicken: Juicy, herb-marinated chicken perfectly balances the sweetness of the peppers and onions, creating a satisfying main dish.
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Hummus Wrap: Spread hummus on a warm tortilla, add roasted peppers and onions, and roll it up for a quick and tasty wrap.
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Balsamic Glazed Greens: The tangy and slightly sweet greens create a wonderful contrast to the smoky peppers, adding depth to your meal.
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Pasta Primavera: Tossed with your favorite pasta, roasted peppers and onions enhance this vegetable-rich dish, making it vibrant and wholesome.
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Chilled Riesling: This fruity white wine refreshes your palate and highlights the sweet undertones of the roasted veggies, perfect for a warm evening meal.
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Fresh Fruit Salad: The juicy, sweet flavors of ripe fruit provide a refreshing contrast to the rich roasted dish, making for a delightful end to your meal.
With these pairing ideas, your table will become a canvas of flavors and textures that turn any meal into a feast!
Make Ahead Options
These Roasted Peppers and Onions are perfect for meal prep! You can slice the bell peppers and onions up to 24 hours in advance, storing them in an airtight container in the refrigerator to maintain their freshness. If you prefer, you can also fully roast the vegetables ahead of time; they will keep well in the fridge for 3-4 days. When ready to serve, simply reheat them in the oven for about 10 minutes at 350°F (175°C) to restore their vibrant flavors and slight crispness. This time-saving approach not only makes weeknight dinners easier but ensures you have a delicious, wholesome side ready to elevate any meal. Enjoy stress-free cooking without sacrificing quality!
How to Store and Freeze Roasted Peppers and Onions
Fridge: Store roasted peppers and onions in an airtight container in the refrigerator for up to 3-4 days. This keeps them fresh for adding to meals throughout the week.
Freezer: For longer storage, freeze roasted peppers and onions in a single layer on a baking sheet before transferring to a freezer-safe bag. They can last for up to 3 months, but note that texture may change once thawed.
Reheating: To reheat, simply warm up in the oven for 10 minutes at 350°F (175°C) or sauté in a skillet until heated through. The delicious flavors of the roasted peppers and onions will brighten your dish once more!
Meal Prep: Preparing a batch of roasted peppers and onions ahead of time is a great way to incorporate them into your meals easily.
Variations & Substitutions for Roasted Peppers and Onions
Feel free to unleash your creativity in the kitchen with these delightful twists and substitutions!
- Dairy-Free: Replace cheese with a sprinkle of nutritional yeast for a cheesy flavor without dairy. It adds a lovely umami touch to the dish.
- Seasonal Veggies: Incorporate zucchini, mushrooms, or eggplant for more variety and texture, making your dish even more colorful and delicious. Each addition brings a unique flavor profile that elevates the experience.
- Herb Infusion: Experiment with different herbs such as thyme or rosemary for a refreshing twist. Fresh herbs can elevate the dish and give it a seasonal flair.
- Spicy Kick: For a spicier version, include jalapeños or other hot peppers. The heat adds an exciting layer of flavor that makes every bite thrilling.
- Protein Boost: Mix in cooked chickpeas or black beans for added protein and heartiness. This variation not only enhances nutritional value but also transforms the dish into a fulfilling meal.
- Flavorful Marinade: Marinate the vegetables in balsamic vinegar or a zesty citrus dressing before roasting. This adds a tangy note that balances the sweetness of the peppers beautifully.
- Roasted Garlic: Toss in whole garlic cloves with the veggies during roasting for a deliciously rich flavor. Roasted garlic will infuse the dish, adding depth and aroma.
- Gluten-Free Grain Bowl: Serve your roasted peppers and onions as a vibrant topping for quinoa or brown rice bowls, enhancing your meal with color and flavor. A wonderful way to turn a side dish into a wholesome main!
With these variations, your Roasted Peppers and Onions will never be boring, just like how you can elevate your meals with my Cookies Cream Dessert or those great flavors found in Chinese Beef Broccoli.
Expert Tips for Roasted Peppers and Onions
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Cut Evenly: To ensure consistent cooking, slice your vegetables into similar sizes. This helps them roast perfectly without some being undercooked while others are overdone.
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Toss Halfway: Remember to toss the veggies halfway through roasting. This encourages even caramelization and maximizes the delicious smoky flavor of your roasted peppers and onions.
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Avoid Covering: Don’t cover your baking sheet; doing so will create steam, leading to soggy vegetables instead of those lovely charred edges.
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Check for Doneness: Look for tender veggies with lightly charred edges as your final indicator of doneness. You want them soft but still holding their shape!
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Finishing Touches: Consider using a broiler for 1-2 minutes at the end for an extra layer of char. It adds depth to the flavors and makes the dish even more visually appealing.
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Experiment Freely: Feel free to mix in seasonal veggies or different spices to create your own twist on this classic recipe. The options for roasted peppers and onions are endless!

Roasted Peppers and Onions Recipe FAQs
How do I select ripe bell peppers for roasting?
Absolutely! When choosing bell peppers, look for those that are firm, shiny, and free of dark spots. The skin should be vibrant in color, and you want to avoid any peppers with wrinkles or soft spots, which indicates overripeness. If possible, go for organic options; they tend to have better flavor and less pesticide residue.
How should I store leftover roasted peppers and onions?
You can store roasted peppers and onions in an airtight container in the refrigerator for up to 3-4 days. Make sure they are completely cooled before sealing the container to help maintain freshness. A glass container works wonders for keeping the flavors intact!
Can I freeze roasted peppers and onions?
Yes! For freezing, spread your roasted peppers and onions in a single layer on a baking sheet to prevent clumping. Freeze for about 1-2 hours, then transfer to a freezer-safe bag. They can last for up to 3 months in the freezer. Just remember, the texture may be a bit softer when thawed, but the flavors will still shine through!
What if my roasted peppers and onions turn out soggy?
Very good question! If your roasted peppers and onions become soggy, it’s often due to overcrowding the baking sheet or covering it while roasting. To achieve that perfect caramelization, spread the veggies out in a single layer and avoid covering them. If they’re soggy after roasting, you can always pop them under the broiler for a couple of minutes to crisp them up again.
Are roasted peppers and onions safe for my pets?
Generally, it’s best to avoid giving your pets bell peppers and onions. While bell peppers are safe in moderation for dogs, onions are toxic and can cause severe health issues. Always consult your veterinarian before introducing new foods into your pet’s diet.
Can I use different vegetables or spices in this recipe?
Absolutely! Feel free to mix in seasonal veggies, like zucchini or mushrooms, or switch up the spices to suit your palate. If you’re in the mood for something spicy, try adding jalapeños! The beauty of this roasted peppers and onions recipe lies in its versatility. Enjoy experimenting to find your favorite combinations!

Roasted Peppers and Onions: A Vibrant Vegan Side Dish
Ingredients
Equipment
Method
- Preheat your oven to 400°F (200°C).
- Slice the red, orange, and yellow bell peppers along with the small onion into even pieces.
- Arrange the sliced peppers and onion on the baking sheet in an even layer.
- Drizzle with avocado oil and sprinkle with smoked paprika, oregano, salt, and pepper. Toss to coat evenly.
- Roast in the oven for 20 minutes until softened and lightly caramelized.
- Toss the vegetables and return to the oven for an additional 10 minutes.

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