Wash and soak moong dal for 15 to 30 minutes. Drain off the water from dal. Add dal, salt, ginger, garlic and chilies with little water to a blender jar and blend it till smooth with a consistency similar to dosa batter. Do not add more water after the grinding is done. It has to be made to the right consistency while grinding.

Smear oil over a tawa and heat it. When it is smoky hot, sprinkle water and evaporate. Rub the pan with a piece of onion all over.

Pour one ladle of batter and spread the batter to make a thin dosa. Sprinkle little oil at the edges.

Flip and toast the dosa on the other side, flip it back and toast on a low heat till it turns crispy.

Sprinkle water on the tawa, rub it with onion and repeat making next dosa.

Serve moong dal dosa hot with coconut chutney.