Tender lentils slow-simmered with warming turmeric, finished with a sizzling tarka of golden ghee, roasted cumin, and fresh coriander.
Squeeze the tamarind thoroughly and discard the pulp, keeping the extract.
Boil the tamarind extract with the mashed tomatoes, rasam powder, and salt for 8 minutes until the raw smell fades.
Add the mashed cooked dal and simmer 3 minutes without boiling hard.
Heat the ghee, pop the mustard seeds with the curry leaves and asafoetida, and pour over the rasam.
Pour the hot rasam over the cooked rice, fold gently, and rest 5 minutes before eating.