Soak all the ingredients separately after washing it 2-3 times.
After washing, soak them for 4-5 hours.
Grind urad dal after squeezing out the water completely. Add ice during the process of grinding.

Remove the mixture when finely ground.
Add steamed rice to the grinder and grind it till it has turned fine in texture.
Add both the rice and grind it such that it is neither too coarse, nor too fine.
Mix all the ground mixtures together and leave it for fermentation.

Pour the mixture in idly steamer and cook for 10 min (till it get cook)

Garnish and serve with coconut chutney and sambhar..