Do you have extra red bell peppers and aren’t sure what to make? Roast or grill them and turn them into a vibrant, flavorful red pepper sauce. This simple recipe contains no added sugar and uses only recognizable, wholesome ingredients.
Roasted red bell pepper sauce brightens any plate with its color and natural sweetness. This version blends influences from Balkan ajvar and an Italian-style roasted pepper cream, resulting in a versatile condiment. It pairs especially well with tomatoes and walnuts for a nutty, creamy texture. Below you’ll find what to use, how to prepare it, serving suggestions, and a few helpful tips so your sauce turns out perfect every time.
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Why does roasted red bell pepper sauce work?
Roasting red bell peppers concentrates their natural sugars and adds a slight char that deepens flavor. When blended with garlic, extra virgin olive oil, walnuts, fresh basil, and seasonings, those roasted peppers become a silky, nutrient-rich sauce that complements many dishes.
Ingredients needed for red bell pepper sauce
- Tomatoes – Use any non-watery variety; cherry tomatoes are great here.
- Red bell peppers – Roasted in the oven, broiled, or grilled.
- Onions – Red onion or shallots add sweetness and depth.
- Garlic – Fresh or roasted, depending on your preference.
- Walnuts – Adds texture and a nutty flavor; don’t skip unless allergic.
- Basil – Use fresh for the best aroma and flavor.
- Cayenne pepper – A pinch for mild warmth; the sauce is not spicy.
- Olive oil – Use a good extra virgin olive oil (EVOO).
- Salt – Use a quality salt such as Celtic or kosher.
- Black pepper
- Turmeric – Optional, for color and added health benefits.
Refer to the recipe card below for specific quantities.
How to make roasted red pepper sauce
This sauce is quick and forgiving. Roast the vegetables, peel the peppers, then blend everything with walnuts, basil, and seasonings until you reach your preferred texture.
- Step 1: Arrange tomatoes, onion wedges, garlic, and peppers on a tray. Drizzle a little olive oil and season lightly.
- Step 2: Roast in the oven for about 20–30 minutes until the vegetables are softened and the peppers show charred spots.
- Step 3: Transfer peppers to a bowl, cover to steam for 10–15 minutes, then peel and remove cores and seeds.
- Step 4: Add the peeled peppers, roasted tomatoes, onion, garlic, walnuts, basil, olive oil, and spices into a blender.
- Step 5: Blend in short bursts until the sauce reaches the texture you like — smooth or slightly coarse with walnut bits.
- Step 6: Serve immediately or use as desired. See serving ideas below.
- Step 7: If storing, spoon the sauce into a jar and cover the surface with olive oil to preserve freshness.
- Step 8: Refrigerate for up to 4–5 days. Olive oil may solidify when cold; bring the jar to room temperature before serving if desired.
Hint: If you have leftover sauce, keep it covered with olive oil in the jar. The oil layer protects the sauce; it may thicken when refrigerated but will return to normal as it warms.
How to roast red bell peppers
Choose any of these common methods to roast peppers. Each one enhances sweetness and adds a slightly smoky character.
- Oven Method:
- Halve peppers and place cut-side down on a lined baking sheet.
- Roast at high heat until skins are blackened and flesh soft.
- Steam in a covered bowl or paper bag, then peel the skins.
- Broiler Method:
- Broil close to the heat, turning frequently until evenly charred.
- Stovetop Method:
- Char whole peppers over a gas flame or in a grill pan for extra smokiness.
- BBQ Roasting Method:
- Place whole peppers on medium-high grill grates, turning often until skins are blistered and blackened (about 10–15 minutes).
- Transfer to a covered bowl and let steam for 10 minutes before peeling.
Variations and Substitutions
You can tweak the sauce to match your taste or dietary needs:
- Add vinegar for tang—great if serving as a chip dip.
- Add apple—blend in a diced apple for a sweet-tart note.
- Deluxe—stir in avocado for extra creaminess.
- Spicy—add red chili flakes or fresh chili for heat.
- Fresh herbs—try coriander, dill, or parsley depending on the dish.
- Add cheese—blend in feta or cream cheese (watch salt levels) or swap for Greek yogurt.
- Nut-free—replace walnuts with sunflower or pumpkin seeds, or a spoonful of tahini.
- No tomatoes—substitute with extra peppers if needed for allergies.
Serving Suggestions
This red pepper sauce is highly versatile. Use it to dress pasta, spoon over roasted vegetables, serve as a dip, spread on sandwiches, or as a bright sauce for grilled proteins and tofu. It’s delicious on baked potatoes, mixed into soups, or added to grain salads for extra flavor.
Top ways to serve roasted red bell pepper sauce
- Pasta: Toss with spaghetti, ravioli, or zucchini noodles for a quick meal.
- Dip: Serve with pita, vegetable sticks, or crisp chips.
- Spread: Use on sandwiches, burgers, or wraps.
- Pizza: Substitute for tomato sauce for a smoky, nutty base.
- Proteins: Spoon over grilled chicken, fish, or pan-fried tofu.
- Vegetables: Drizzle over roasted veg or baked potatoes.
Expert Tips
Tips for the perfect roasted red pepper sauce
Adjust seasonings: Taste and tweak salt, acidity, and heat to suit your palate.
Blend gradually: Pulse the blender to control texture—leave walnut pieces if you prefer some crunch.
Rest overnight: The flavors meld and deepen after a day in the fridge.
Recipe FAQs
Yes. Jarred roasted peppers are a convenient shortcut; freshly roasted peppers will deliver the most vibrant flavor.
Store in an airtight jar in the fridge and use within 4–5 days. Keep the surface covered with olive oil to prolong freshness.
Yes, freeze for up to one month. Thawed sauce may be slightly more watery—stir or drain excess liquid if desired.
It’s related but not identical. Both share roasted peppers, garlic, nuts, olive oil, and spices. Traditional Romesco often includes vinegar and bread and uses almonds or hazelnuts; this recipe uses walnuts, basil, and turmeric, which are non-traditional additions.
Looking for other recipes?
Here are a few dishes where fresh or roasted peppers work wonderfully.
-
Easy Roasted Pepper Salad
-
Healthy Lentil Bread (Flourless)
-
Stuffed Peppers And Tomatoes
-
Egg On Tortilla
What to pair roasted pepper sauce with
Some favorite pairings include grilled proteins, roasted vegetables, pasta, sandwiches, baked potatoes, and grain or vegetable bowls. The sauce’s sweet and nutty profile complements a wide range of savory dishes.
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Clafoutis Aux Cerises (French Cherry Dessert)
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The BEST Moist Chocolate Cake Recipe
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Easy White Chocolate Raspberry Muffins
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Easy Broccoli Bread (High Protein)
Roasted Red Bell Pepper Sauce
Equipment
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1 blender
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1 knife
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1 oven tray
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1 chopping board
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1 glass bowl
Ingredients
- 3 medium red bell peppers
- 15 medium cherry tomatoes
- 2 small red onions
- 2 small shallots
- 3 small garlic cloves
- 1 handful walnuts
- 10 sprigs fresh basil
- ⅛ teaspoon cayenne pepper
- 1 tablespoon olive oil
- ½ teaspoon turmeric
- ¼ teaspoon Celtic salt
- ⅛ teaspoon black pepper
Instructions
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Preheat oven to 200℃/400℉. Prepare ingredients by washing and chopping where needed.
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Place peppers, tomatoes, garlic, and onions on a tray. Drizzle with olive oil and season with salt and pepper.
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Roast for about 30 minutes until vegetables soften and peppers show charred spots. Transfer peppers to a covered bowl to steam for 10–15 minutes to loosen skins.
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Peel peppers, remove seeds and cores, then place peppers and the rest of the roasted vegetables in a blender with walnuts, basil, spices, and olive oil.
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Blend to your preferred consistency. An immersion blender works well too.
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Serve immediately or jar and cover with olive oil for storage. Refrigerate and use within a few days.