Mix the rava and rice flour together. Add salt, cumin seeds, green chillies, hing and onion to it. Mix well. The batter should be thin.
Heat the tawa and drizzle some oil on it. Now carefully spread the batter on the tawa. Cook it on a low flame. Drizzle some oil on the dosa. Once the dosa turns golden brown, turn over to cook the other side. When both sides are cooked well, our rava dosa is ready to serve.
You can serve it with hot chutney or sambar.