Jeera - 2 tsp
Tomato - 2
Toor dal - 1 tsp
Red chilly - 1
Lemon juice - 1 tsp
Soak jeera, toor dal and red chilly for half an hour and grind them.
Take a pan, put chopped tomato and salt .
Let it boil in water for 5 mins .
Then add ground paste and required amount of water.
When the foam farms switch off the fire.
Take a pan ,splutter mustard seeds and pour it to the rasam.
Add coriander leaves, curry leaves , lemon juice and serve.
This can be even taken as a soup also.