Assured for Trying - நீங்கள் இதை முயற்சி செய்யலாம்.

Rice flour- 2 1/2 ups, Urad dhall - 1 cup, Yeast- I pinch, luke warm water- 2 tablespoons, salt - 1teaspoon

First soak the urad dhall in hot water for 45 Minutes and then grind it as a fine paste.
Then Mix 2 1/2 cups of Rice flour in water to get the batter consistency and then add the urad dhall paste and salt and the yeast soaked in luke warm water mix it well and keep it aside for 1 hour and U can make fluffy idlis..!