In a mixing bowl, add rava, riceflour, besan, chopped onion, chopped coriander, chopped green chilly, cumin seeds, salt and water.
Mix all the ingredients well witha whisk. Keep this batter aside for a minimum of 15 minutes.
Heat a pan. When the pan is piping hot, pour a ladleful batter on the pan. Start pouring the batter from the edges towards the centre of the pan.
Once you have poured the batter, reduce the flame to low. Let the dosa cook on a low flame.
Drizzle oil at the edges of the dosa and also few drops on the holes formed by the dosa.
When the edges of the dosa start getting crispy, gently loosen the edges of the dosa. Lift the dosa and fold it.
Serve hot with coconut chutney.