Instant Pot tomato soup is a creamy soup made mostly with pantry staples in 30 minutes. It is keto, healthy, vegetarian, and super comforting, making a great pair for grilled cheese sandwiches.
1cupof canned fire-roasted tomatoesor you can roast fresh tomatoes
⅓cuplow-sodium vegetable brothor chicken broth if you prefer
16ozmarinara saucechoose one without added sugar such as RAO's, or homemade Pomodoro sauce
2teaspoongranular sweetenere.g. Erythritol
1tablespoontomato pastenot tomato sauce
¼cupchopped fresh basilpreferred, or ½ tablespoon dried basil plus extra to garnish
½teaspoonItalian seasoning
Salt and ground black pepper to taste
⅓cupheavy creamor enough to get to your ideal thickness. If you prefer, use Greek yogurt
2ozcream cheesesoftened
¼teaspoonxanthan gumYou can omit it if you don't have it and add extra 1-2 oz cream cheese to the soup
Instructions
Turn on the sauté function of your Instant Pot and let it heat for about 2 minutes. Sauté the onion for 3-4 minutes, stirring now and then, until tender. Add the garlic and cook for 30 seconds while stirring.
Stir in the roasted tomatoes and then the broth to deglaze any browned bits of the onion from the pot.
Add the marinara sauce, sweetener, tomato paste, and seasonings (basil, Italian seasoning, salt, and pepper).
Turn off the sauté function. Lock the lid, turn the valve to sealing, and set it to HIGH pressure for 15 minutes. After cooking, let the pressure release naturally, for about 5-10 minutes.
Unplug the Instant Pot and add the cream, cream cheese, and xanthan gum. Use a handheld immersion blender to puree the tomato soup until smooth. Alternatively, you can blend the soup, in 2 batches, either in your blender or food processor.
Adjust the broth and seasoning to taste to get to your ideal thickness and flavor.
Serve hot with a melty low-carb grilled cheese sandwich.
Recipe Notes
Storage Refrigerate leftovers in an airtight container for up to 3-4 days.Reheat in a pot on the stovetop over medium-low heat, stirring now and then until hot. Or, cover the soup and reheat it gently in the microwave.How to FreezeBecause this keto tomato soup contains dairy, the best way to freeze it is to puree the soup and leave the dairy out. Then, once the soup is cool, place it in a freezer-safe container for up to 2 months. Defrost in the fridge overnight and reheat the soup over medium-low heat. Then, whisk in the cream cheese, heavy cream, and xanthan gum until homogeneous and thickened to your desired consistency.
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