Fry the above ingredients (except cumin seeds) and grind them with cumin seeds into smooth paste. ( The above ingredients cn be ground as such without frying. In that case, don't add coriander seeds. Grind only pepper, dhal,chillies and cumin seeds)
Soak the tamarind and take about 500 ml. of juice. Add salt and asafoetida.
Boil for five minutes and then add the ground masala.
simmer for 10 minutes.
When the rasam froths up, add curry leaves and coriander leaves.