Ingredients
Coconut - 1/2
Tomatoes - 3
Curry Leaves - 10
Coriander - as desired
Red Chilies - 2
Cumin Seeds - 1/4 tsp
Mustard Seeds - 1/4 tsp
Turmeric
Salt - to taste
Red Chili Powder - pinch
Cumin Powder - 1/4 tsp
Methi Powder - pinch (or) rasam powder

Method
Take chopped coconut with one glass of water and grind then separate milk and keep aside.
In a pan take cut tomatoes, coconut milk, coriander, powders or rasam powder, turmeric, salt, chili powder and boil on medium for 10 minutes.
In a separate pan take oil, cumin seeds, mustard seeds, curry leaves and let it to splutter and then add to boiled rasam.
Serve with rice.
Note: Chopped coconut separated from milk can be used in curries.