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 the turmeric and 2 cups water until mushy; mash smooth.
Soak the tamarind in 1 1/2 cups warm water, squeeze, and strain the extract.
Boil the tamarind extract with the shallots and 1 tsp of the salt for 8 minutes until the shallots soften.
Stir in the sambar powder and simmer 3 minutes.
Add the mashed dal with 1 cup water and the remaining salt; simmer 10 minutes until slightly thickened.
Heat the sesame oil, pop the mustard seeds and curry leaves, pour into the sambar, and serve with rice or dosa.