Keto Tomato Soup with Basil Oil (Print version)

Creamy low-carb tomato soup finished with bright basil oil, made in about 35 minutes with pantry tomatoes and simple aromatics.

# Ingredients:

For the soup

01 - 1 tablespoon extra-virgin olive oil
02 - 1 tablespoon unsalted butter
03 - 1/2 cup (55 g) diced celery
04 - 1/4 cup (35 g) finely diced yellow onion
05 - 3 garlic cloves, minced
06 - 1 tablespoon tomato paste
07 - 1 can (28 oz / 794 g) no-sugar-added crushed tomatoes
08 - 1 cup (150 g) cherry tomatoes, halved
09 - 2 cups (480 ml) vegetable broth, no sugar added
10 - 1/2 teaspoon fine sea salt, plus more to taste
11 - 1/4 teaspoon black pepper
12 - 1/8 teaspoon crushed red pepper flakes, optional
13 - 1/2 cup (120 ml) heavy cream
14 - 1/4 cup packed fresh basil leaves

For the basil oil

15 - 1/2 cup packed fresh basil leaves
16 - 1/3 cup (80 ml) extra-virgin olive oil
17 - 1 teaspoon fresh lemon juice
18 - 1 small pinch fine sea salt

# Instructions:

01 - Warm the olive oil and butter in a large saucepan over medium heat. Add celery and onion and cook for 4-5 minutes, stirring often, until softened but not browned.
02 - Add the garlic and tomato paste. Cook for 1 minute, stirring constantly, until the paste darkens slightly and the garlic smells fragrant.
03 - Stir in the crushed tomatoes, cherry tomatoes, vegetable broth, salt, pepper, and red pepper flakes if using. Bring to a gentle boil, then reduce the heat and simmer uncovered for 18-20 minutes.
04 - Stir in the fresh basil and heavy cream. Blend with an immersion blender until smooth, or use a countertop blender in batches with the lid vented. Taste and adjust salt.
05 - Blend the basil leaves, olive oil, lemon juice, and salt until smooth and bright green. Strain through a fine sieve if you want a smoother oil.
06 - Ladle the hot soup into bowls. Drizzle each serving with basil oil and add extra black pepper if desired.

# Good to know:

01 - Estimated at about 6 grams net carbs per serving, depending on tomato brand.
02 - Best served hot with basil oil added right before eating.
03 - Store soup and basil oil separately for the best color and flavor.

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