1. Heat the olive oil in the pressure cooker on sauté mode.
2. Add the chopped onion, garlic, carrots, and celery. Sauté until softened.
3. Add the red lentils, vegetable broth, ground cumin, ground coriander, turmeric, salt, and black pepper. Stir well.
4. Close the lid of the pressure cooker and set it to high pressure for 10 minutes.
5. Once the cooking time is up, allow the pressure to release naturally for 10 minutes, then quick release any remaining pressure.
6. Open the lid, stir the soup, and adjust seasoning if necessary. Serve hot.