Rhythm Rielly

Roasted tomato and pepper soup is what happens when the late-summer garden starts leaning toward autumn. Tomatoes are still sweet and abundant, peppers are finally showing off, and a hot bowl of something suddenly sounds good again. Roasting everything first concentrates the harvest into a rich, silky soup without requiring hours at the stove.

This recipe is part of the September Garden Recipes collection, where summer produce begins finding its way into warmer, cozier meals.

Why Roast the Tomatoes and Peppers?

Roasting drives off some of the vegetables’ excess water while browning their edges, concentrating both sweetness and savory flavor. It is especially useful when garden tomatoes are extremely juicy or when you have a mixed bowl of slicing, paste and cherry tomatoes to use at once. Garlic and onion roast alongside them, so most of the soup’s flavor develops on the sheet pan before anything reaches the pot.

Roasted Tomato and Pepper Soup

Serves: 4–6   |   Prep: 15 minutes   |   Roast: 35–45 minutes   |   Finish: 10 minutes

Ingredients

• 2 pounds ripe tomatoes, cored and halved or quartered
• 2 large red, orange or yellow bell peppers, seeded and cut into large pieces
• 1 medium yellow onion, cut into wedges
• 5 garlic cloves, peeled
• 3 tablespoons olive oil
• 1 teaspoon kosher salt, plus more to taste
• ½ teaspoon freshly ground black pepper
• ½ teaspoon smoked paprika
• ¼ teaspoon red pepper flakes, optional
• 2 cups vegetable or chicken broth, plus more as needed
• 1 teaspoon balsamic vinegar or red wine vinegar
• ½ cup loosely packed fresh basil leaves
• ¼ cup heavy cream or plain Greek yogurt, optional

Instructions

1. Heat the oven to 425°F. Line a large rimmed baking sheet with parchment for easier cleanup if desired.
2. Arrange the tomatoes, peppers, onion and garlic on the baking sheet. Drizzle with olive oil and season with salt, black pepper, smoked paprika and red pepper flakes if using. Toss gently to coat, then spread everything into a mostly even layer.
3. Roast for 35–45 minutes, until the tomatoes have collapsed, the peppers are tender and the edges of the vegetables are beginning to brown. If the garlic darkens quickly, tuck it beneath a tomato or onion wedge.
4. Transfer the roasted vegetables and all their juices to a large pot. Add 2 cups broth and bring to a gentle simmer for about 5 minutes.
5. Blend until smooth with an immersion blender, or carefully blend the soup in batches in a countertop blender. Add more broth if you prefer a thinner soup.
6. Stir in the vinegar and fresh basil. For a creamy version, reduce the heat to low and stir in the cream, or temper Greek yogurt with a little warm soup before stirring it into the pot.
7. Taste and adjust the salt, pepper and acidity. Serve hot with basil, Parmesan, croutons or a drizzle of olive oil.

Use Whatever Tomatoes Are Ready

This soup is forgiving enough for the garden’s miscellaneous tomato bowl. Roma and other paste tomatoes produce a thicker soup, beefsteaks contribute plenty of juice, and cherry tomatoes roast into intensely sweet little pockets. Very ripe, cracked or cosmetically imperfect tomatoes are welcome as long as they are still sound—simply trim away damaged areas before roasting.

Easy Variations

• Make it smoky: Roast a poblano or another mild chile with the bell peppers.
• Make it creamy: Finish with cream, half-and-half, coconut milk or tempered Greek yogurt.
• Add more garden herbs: Thyme and oregano can roast with the vegetables; add basil near the end to keep its flavor fresh.
• Make it heartier: Blend in a drained can of white beans for extra body and protein.
• Turn it into pasta sauce: Use less broth and simmer the blended mixture until thick enough to coat pasta.

What to Serve With It

This soup practically asks for bread. Serve it with grilled cheese, toasted sourdough, focaccia or a thick slice of savory zucchini cheddar bread. A simple green salad makes it a complete light supper, while tortellini or small cooked pasta can be added directly to the bowl for something more substantial.

Storage, Freezing and Harvest Rescue

Refrigerate cooled soup in a covered container for up to 4 days. It also freezes beautifully for about 3 months; for the most flexible freezer batch, freeze the soup before adding dairy and stir cream or yogurt in after reheating. If tomatoes and peppers are arriving faster than you can eat them, roast several trays at once and freeze the blended soup in meal-size portions. A September glut becomes a January lunch.

Useful Tools for Roasted Tomato Soup Prep

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Glass Meal-Prep Containers

Portion cooled soup for lunches, leftovers, or the freezer, leaving headspace when freezing. Shop glass meal-prep containers.

Small Silicone Spatulas

Scrape the last of the blended roasted vegetables from the pot and stir in your finishing ingredients. Shop small silicone spatulas.

Small Cutting Board

Useful for trimming tomatoes, peppers, garlic and garden herbs before roasting. Shop the small cutting board.

Reusable Mini Condiment Containers

Keep basil or crunchy crouton toppings separate for serving instead of letting them soften in stored soup. Shop mini condiment containers.

From the September Garden

Late-summer tomatoes and peppers are only the beginning. Explore 10 September Garden Recipes for the Late-Summer Harvest for zucchini, okra, apples, grapes, squash, herbs, preserving ideas and what to plant next.