Soak tamarind in the hot water for 30 min and take the tamarind juice with mixing 1 cups of water. Mash the tomato and mix with the tamarind juice.
COOKING:
In a pan heat oil. When hot add mustard and when the mustard splutters add asefoetide, green chili, curry leaves ,pepper powder, cumin powder, rasam powder ,dhal powder and fry for 2 - 3 min.
Add the tamarind and tomato juice extract. Add required salt. Add chopped coriander leaves. Allow this to boil for 2 -3 min in medium flame.
TIPS:
Chopped Garlic can also be added for variation.
Recipe by Sashi Recipes at https://www.sashirecipes.com/instant-rasam.html