Wash and soak all the dals for 1/2 hour. Drain and grind to a smooth paste.
Ferment this batter overnight.
Just before making idlis, heat a nonstick pan with oil, temper with curry leaves, mustard, and urad dal.
Next, add the grated beets and saute for a few minutes.
Add this tempering to the idli batter, mix well.
Grease the Idli molds and pour into the dents.
Steam the idlis for 15 to 20 mins.
Serve with Side dishes.