Rinse the red lentils thoroughly and drain.
In a saucepan, combine lentils, turmeric, chili powder, tomato, and water. Bring to a boil.
educe heat and simmer for 15–20 minutes until the lentils are soft and breaking apart. Stir occasionally.
Add salt and coconut milk. Stir and simmer for 5 more minutes.
In a separate pan, heat coconut oil. Add mustard seeds, curry leaves, and onion. Sauté until golden.
Pour the tempered spices and onions into the lentils. Mix well.
Serve hot with rice, roti, pittu, or string hoppers.