Rinse urad dal and idli rava in separate bowl well. Soak in sufficient amount of water separately. Add methi dana in urad dal and cover it. Soaked at least 5 to 6 hours.

Then drain the water from urad dal and grind it into fine paste. Transfer it to the large mixing bowl.

Squeeze the water from idli rava and grind it coarsely. Transfer it to the same large mixing bowl.

Mix them together well. Cover the bowl and keep it in warm place to ferment for 6 to 8 hours.

Batter is ready to make idli. Add salt and mix well. Add little water if required and stir gently.

Grease the idli stand with oil. Heat the steamer or vessel with water on medium flame.

Pour the batter in the idli moulds. By that time water must be boiling in the steamer or vessel. Place the idli stand in the steamer or vessel. Cover the vessel with lid and steam the idli for 20 minutes on medium low flame.

After 20 minutes switch off the gas. Rest it for 10 minutes in steamer.

Then remove the idli stand. Steaming hot idlis are ready. Serve it with coconut chutney or sambar.