Dry lentils will take about 15 minutes to cook in an Instant Pot, whereas the pre-soaked lentils for the salad will need 5 - 6 minutes. First, wash the dry lentils thoroughly to remove dirt or stones. Once done, add them into the inner pot with enough water to submerge the lentils and salt to taste. Set the IP to pressure cook mode for 5 minutes. Once done, release the pressure manually, and check lentils for doneness.