- Roast ¾ cup rolled oats on low flame till it turns crisp. cool completely and blend to a fine powder. transfer the powdered oats into a large bowl. also add ½ cup rice flour and ¼ cup rava. further add 1 tsp salt and 2½ cup water. whisk and mix well. further add 1 tsp pepper, 1 inch ginger, 1 chilli, ½ onion, 2 tbsp coriander and few curry leaves. mix well and rest the batter for 20 minutes. mix well. now carefully pour the dosa batter over very hot tawa. also spread a tsp of oil . lower the flame and cook until the dosa turns golden and crisp. Serve hot with chutney.