Extract the juice of soaked tamarind and discard the pulp.
Ground the ingredients mentioned under rasam powder to a fine powder.
Take tamarind extract , add chopped tomatoes, curry leaves turmeric powder and salt as
needed.
Add one cup of water and boil on low heat until it reduces and the raw flavor of the tamarind goes.
Add the ground rasam powder. Switch off when it becomes frothy.
Heat a teaspoon of ghee. Add mustard, fenugreek seeds, asafetida and curry leaves.
When it splutters, pour it over the rasam.
Garnish with coriander leaves and serve hot with steamed rice.