Add 1 cup of rice idli mix to half cup luke warm water & half cup sour curd to form batter.
Keep aside for 5 -6 minutes. Boil 250 -300 ml water in idli maker cooker/vessel. Grease the idli plates with oil.
Steam the batter in idli cooker or vessel for 15 min in medium flame. Serve hot with sambhar & coconut chutney.