How to make Rasam- a south indian dish

boil the thoor dal in two cups of water till it is cooked.
then separate the water and crush the dal well to make it a paste.
keep the water and dal paste aside.

Extract tamarind pulp with 1.5 cups of water

Put tamarind pulp in a vessel with asafoetida, rasam powder, curry leaves, coriander leaves, and salt to taste and bring to a boil.
allow to simmer for a few minutes until the tamarind loses its raw flavor.

Add quartered tomatoes, water from the biled dal and the dal paste to the above mixture and bring it to a boil.
then remove it from fire.

Heat a little oil and add mustard seeds, till the seeds crackle.
then add it to the rasam.You are now ready to serve it!!!