Soak the lentils in
half the water for 30 minutes. Grind the
cumin, peppercorns, chilies, ginger,
coconut, japery and salt to a fine
paste then stir it into the lentils.
Add the remaining water,
bring to the boil and simmer until the lentils
are tender. Add some more water if the rasam
becomes too thick during cooking.
Heat the ghee and fry the
mustard and cumin seeds, asafetida, chili and
curry leaves until the seeds start crackling.
Stir into the rasam and serve hot, garnished with
coriander.