Steps for preparation

Wash the (1 cup)pearl millet twice to remove the debris, add poha(1/2 tsp), methi seeds(1/2 tsp), wash again and soak it in enough water for( 5 to 6) hours. Wash and soak (1/4 cup) urad dal separately in another bowl for 2 hours.
First grind urad dal in a mixie to a thick, smooth batter adding enough water. This soaked water can be used for grinding. You can also use ice cold water. Then grind the soaked pearl millet + Poha to a smooth batter adding required water. Do not make the batter watery.
Mix both the batter well with your hands and allow it to ferment overnight or 12 hours based on the weather in your place. The next morning, batter would have raised well. Its consistency should be like regular idli batter.
Mix well and make idli in a greased idli plate. Steam it for (10 to 15) minutes. Remove after it becomes warm. It tastes super soft when hot with the flavor of pearl millet. Serve hot to enjoy its best taste.