Wash lentils, drain, and add 1.5 cups water to the lentils in a bowl. Add half cup water to the Instant Pot (IP) container and set the bowl in the container (pot-in-pot method). Close lid, and set on pressure cook mode for 22 minutes. Allow for natural steam release. With a spoon or spatula, mash the cooked lentils to a fine paste. Add salt, 3 cups water and mix well, to get a soupy texture. Now wipe out the IP container dry, to get it ready for the next step.
While lentils are cooking, prep the rest of your ingredients: garlic, onion, tomato, spinach, and set them aside in a bowl for quick access.
Set IP to 'sauté' mode and add oil. Wait for the 'hot' sign, add garlic and allow it to brown slightly. Add onion and repeat the process. Now add tomatoes and cook for a couple of minutes. Add spinach and the soupy lentils. Mix well and allow the contents to simmer.
Transfer to bowl and serve hot.
Notes
This soup can be made part of a meal or simply enjoyed by itself.*Use organic ingredients wherever possible