Mix Rava, Maida and Rice flour with water without forming lumps. The consistency should be that of a dosa batter. While mixing with hand, also add salt . If it becomes sticky, add little more rice flour. For softness, sour curd can be added. (Not Required though) Add cut onions, coriander leaves, ginger and green chillies to the mixture . In a small non stick pan, add oil, mustard seeds. When it splutters, further add cuminseeds and curry leaves. Pour this into the dosa mixture. Mixture should be soaked for 1/2 hr before making do