Add garlic, cumin, oregano, and thyme. Cook for 1 minute until fragrant. Press Cancel.
Stir in the rinsed red lentils, crushed tomatoes, vegetable broth, salt, pepper, and tomato paste.
Secure the lid and set the vent to Sealing. Select Manual or Pressure Cook on High for 10 minutes.
When the cooking time finishes, allow a Natural Pressure Release for 10 minutes, then carefully switch the valve to Venting to release any remaining pressure.
Open the lid. Stir the soup well. If you prefer a smoother texture, use an immersion blender to partially blend the soup to your liking.
Taste and adjust salt and pepper before serving.
Notes
For a richer flavor, you can add 1 teaspoon of smoked paprika with the other spices.
If the soup is too thick after resting, add a little more broth or water until you reach your desired consistency.