Sambar powder 2 to 3 tsp
Coriander leaves chopped 1 tbsp
Mustard seeds ½ tsp
Curry leaves few
Oil 1 tsp
Finely chop tomatoes then add water, sambar powder and salt mix well. And boil it for 5 to 10 min. Then add chopped coriander leaves boil it for 2 min.
Heat oil in pan add mustard seeds when it splutter and curry leaves fry a min then pour this on boiling rasam. Serve with rice and fish fry.