Soak the rice and urad dal for 4 to 5 hours then grind it in the mixer grinder. Make a fine paste and add water as needed. The batter should not be runny, make it medium consistency. ferment this batter overnight or 7 to 8 hours in a warm and dry place.

Wash tur dal,mung dal and add the vegetables. cook this in the cooker.make 3 whisttles

Let it cool.Now in a large vessel make tadaka, add oil mustard seeds,hing,jeera curry leaves add cooked dal and sambar masala add salt as per taste

Add boiled moringo,cook this for 5 to 6 mins your sambar is ready