Pick, wash and soak the daal overnight or for 8 hours.
Pick, wash and drain the rice. Grind it coarsely in a blender.
Grind the daal into a smooth and forthy paste.
Now mix the grinded rice and daal together into a batter.
Mix salt and set aside in a warm place for 8-9 hours or overnight for fermenting.
Idlis are ready to be cooked when the batter is well fermented.