Boil the chopped tomatoes with 2 cups of water for 15 minutes. Mash it well & make it as a watery and keep it aside.

Soak tamarind in warm water and extract its juice (1/2 cup). Throw the pulp.

Take 1/2tbsp of cumin seeds,1/2 tsp black pepper,2 dries red chilies,4 cloves of garlic, few curry leaves and grind it well as a ground powder.

Heat a saucepan adds 2 tsp of oil add mustard seeds, curry leaves turmeric powder, asafoetida, the Grind powder and sauté well.

Now add Mashed tomato water and salt in it and Saute for a few minutes.

Then add tamarind water, keep the flame in low and add ½cup of water .let it boils for 10 minutes until the forth starts forming on the top.

Do not boil the rasam as it will lose its flavor.

Garnish with coriander leaves and serve hot with steamed rice or have it as a soup.