

You’ll never again open a can of tomato soup loaded with sodium and sugars, after trying this smoky Roasted Tomato Basil Soup.
Whether I fire-roast my own tomatoes or go with a combination of fresh tomatoes and canned organic fire roasted tomatoes, this tomato soup is my go-to soup recipe for summer, fall and winter. My kids request it time and again, and it’s so easy to pull together with a few pantry items.
While the soup is cooking, I make the grilled cheese sandwiches, and everything comes together at once. If you are not using in season ripe Roma or tomato on the vine, then I highly recommend using canned San Marzano; they’re whole tomatoes in their own liquid, don’t have that metallic taste many canned tomatoes do, and are bright when cooked, I really love the Muir Glen, Organic Whole Fire Roasted San Marzano Style.
Another crucial ingredient is fresh basil, I harvest my summer basil, clean, and add oil to coat the leaves and store it in a Ziploc bag, then add it straight from the freezer to soups and pasta sauces.
This soup has no cream, I puree the soup in a high-speed blender to get that creamy luxuriousness that comes from adding heavy cream.
This soup is gluten-free, dairy-free, vegan and vegetarian Whole 30 compliant if you skip the small amount of sugar added. No additives, preservatives or artificial colors/flavors, and homemade soup done in less than 30 minutes!
Watch me make it here!
Ingredients:
- 2 tablespoon olive oil
- 1 large yellow onion, sliced.
- 7-8 large tomatoes, Roma (or 2 cans fire roasted diced San Marzano tomatoes)
- 1 cup vegetable broth or water
- 1 tablespoon of garlic paste or 5 garlic cloves, peeled and sliced.
- 1 teaspoon salt
- ½ teaspoon pepper
- 1/3 cup loosely packed fresh basil leaves.
- 1- teaspoon sugar, optional (to even out the tartness of tomatoes)
- ¼ teaspoon oregano (optional)
- ¼ teaspoon red pepper flakes (optional)
Method:
- In a heavy bottomed pot, heat olive oil over medium-high heat. Add onion and cook, stirring, until translucent, then add garlic and sauté for 30 seconds.
- Meanwhile, roast tomatoes over an open gas fire on a wire rack or blister them under the broiler set on high/ or add San Marzano peeled tomatoes with the juice, vegetable stock, and sugar.
- Cook uncovered, for 15 minutes or until tomatoes break down (or you can cook on high pressure for 10 minutes in the Instant Pot – NPR after 10 mins).
- Add the basil, oregano, red pepper flakes, salt, and pepper, and simmer for a few minutes.
- Carefully transfer soup to a high-speed blender and puree soup until there are no large chunks left and as you whip air into soup it turns from a deep red to a creamy orangey shade.
- Serve with melty mozzarella cheese sandwiches.
- Suggested garnishes: parmesan cheese, shredded cheese, buttery croutons, basil chiffonade, or crackers.
Notes
Canned Tomatoes: If you want to skip roasting your own tomatoes, then substitute in 2- cans of fire roasted tomatoes with basil. I love the Muir Glen, Organic Whole Fire Roasted San Marzano Style.

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