Preheat the oven to 400F. Toss the tomatoes with ¼ cup olive oil and season with salt and pepper. Layer on a baking sheet in a single layer. Roast in preheated oven for 45 minutes.
3 pounds. ripe plum tomatoes
Meanwhile, in a large pot over medium heat, sauté the onions and garlic with 2 tablespoons of olive oil, butter, and red pepper flakes until onion is translucent and starts to brown, about 10 minutes.
Bring the soup to a boil and then reduce heat and simmer for 40 minutes, uncovered.
Taste and add salt and pepper or more thyme or basil as needed.
Transfer the soup to a blender or large food processor and puree until smooth.
Serve with fresh grated parmesan cheese on top, fresh basil, and a side of cheesy bread!
Video
Notes
To Make Ahead: Roasted tomato soup can be made a few days ahead of time, stored in the fridge. I think it even tastes better as it sits and the flavors have time to blend.To Freeze: store in a freezer-safe container and freeze for up to 3 months. Thaw overnight in the fridge, then rewarm on the stove. Recipe adapted from Ina Garten