Tender lentils slow-simmered with warming turmeric, finished with a sizzling tarka of golden ghee, roasted cumin, and fresh coriander.
Pressure-cook the toor dal with 1 cup water until soft and whisk it smooth.
Coarsely crush the peppercorns, cumin seeds, and garlic cloves.
Heat half the ghee and wilt the mint leaves and green chilies for 1 minute.
Combine the dal, 2 cups water, crushed masala, mint, and salt and simmer until frothy.
Temper the mustard seeds in the remaining ghee, pour over the rasam, and serve hot.