Tender lentils slow-simmered with warming turmeric, finished with a sizzling tarka of golden ghee, roasted cumin, and fresh coriander.
Pressure-cook the dal with turmeric, salt, and 3 cups water for 4 whistles until soft; whisk lightly.
Add the tomatoes and red chili powder; simmer 10 minutes over medium heat.
Heat the ghee in a small pan; crackle the cumin seeds and dried red chilies.
Add the onion and fry until golden; pour the whole tempering over the dal.
Simmer 2 minutes, scatter coriander on top, and serve with rice or roti.