Ingredients
- 1 tablespoon olive oil
- 1/4 cup chopped onion
- 4 cloves garlic, chopped
- 1 large carrot, chopped
- 1 large stalk celery, chopped
- 2 tablespoons tomato paste
- 1/8 teaspoon crushed red pepper flakes, or more to taste
- 1/8 teaspoon cayenne pepper, or more to taste
- Salt and ground black pepper to taste
- 6 cups chicken stock
- 1 1/2 cups dry lentils
Directions
Heat olive oil in a large saucepan over medium heat; cook and stir onion and garlic until onion is translucent, about 5 minutes.
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Stir in carrot and celery; cook, stirring often, until vegetables are tender, about 8 more minutes.
Stir in tomato paste, crushed red pepper, cayenne pepper, salt, and black pepper; mix in chicken stock and lentils.
Bring soup to a boil and reduce heat to low; simmer until lentils are soft, about 20 minutes.