For Batter: 1cup rice, 1/2cup urad dal, 1/2cup toor dal, 1/4cup chana dal, 5-6 whole dry red chillies. Soak the dals, rice and red chillies for overnight(atleat for 4-6hrs.). Coarsely grind them with green chillies, curry leaves and ginger and salt.
In pan heat 1tsp.oil, once it is hot add mustard and hing, once mustard start to splutter add this to the batter and mix well.
Procedure make Ada:
Fill the ladle with Ada batter, gently pour this batter onto the center of the pan, now begin to spread the batter in circular motion to form dosa(batter should be spread little thick compared to dosas), after spreading the batter out on the pan, drizzle the oil all on the surface of dosa and also around its edges. Allow it to cook for 2minutes, then flip it and cook it for a min., take it out from the flame..The Ada is done......serve it with coconut chutney or your choice of pickle.peanut chutney or red chilli chutney.