Tender lentils slow-simmered with warming turmeric, finished with a sizzling tarka of golden ghee, roasted cumin, and fresh coriander.
Dry-roast the cumin seeds and peppercorns, then grind with the garlic to a coarse paste.
Pressure-cook the toor dal with a little water until very soft; whisk smooth.
Boil the tamarind paste with the water, salt, and spice paste for 8 minutes.
Stir in the dal and simmer 5 minutes until frothy.
Heat the ghee, pop the mustard seeds, pour over this jeera rasam, and serve hot with rice.