Divide the batter into 2 bowls. Add the beetroot puree to one bowl and mix well. Grease the idli moulds.
Spoon a tbsp. of the white batter first. Then spoon a tsp. of the beetroot batter over it and continue to do so, alternately spooning the batter.
Steam in a pressure cooker (without the vent) or steamer for 15 minutes (first 5 minutes on high and the remaining on a medium flame).
Demould the idlis when it slightly cools down and serve with coconut chutney. These appealing idlis are an ideal lunch box meal for your kids.