In this vegan Indian lentil soup recipe, use any variety of lentils—tur/toor dal, red lentils (masoor dal), chana dal, moong dal, brown lentils, or green lentils. Feel free to use whichever lentils you have on hand. This Indian Dal Soup can also be made with mixed lentils. Just be mindful of cooking times, especially when using an Instant Pot. Soaking the lentils beforehand is optional.