oil over medium heat. Saute the diced onion until translucent. Add the salt, pepper, turmeric, and cumin. Cook until fragrant, 30 seconds-1 minute.
washed lentils and water. Bring to a boil, then reduce to the lowest possible temperature.
for a minimum of 8 hours. Monitor the water level and add more if necessary. Smash some lentils against the side of the pot with a wooden spoon to thicken the soup.