In water, soak two cups of rice and half a cup of urad dal for the entire night.
Drain the soaked ingredients and grind them into a smooth batter, adding water a little at a time as necessary.
To ferment the batter, move it to a bowl, cover it, and let it there for eight to twelve hours.
Before steaming, fill a steamer with water and bring it to a rolling boil.
Before steaming, mix the batter slightly and season with salt to taste once it has fermented.
Fill each one with batter, and then stack them in the steamer.
After 10 to 12 minutes of steaming, allow the idlis to cool somewhat before serving them warm.