Take all ingredients to prepare batter. Pour approx. 2-3 cups water in steamer at bottom and heat it over medium flame. Make sure that steamer is at least 4-5 minutes heated before placing the idli plates (filled with batter) in it. Grease 2 idli cooker plates (4-5 inch diameter) using 1-teaspoon oil. and stream for 20 mins. lastly pour the temper on it. serve with green chutney