Soak the whole moong for 3-4 hours.
Soak the Barnyard Millet flakes for a minute in water with a pinch of salt. Drain it and again soak it in 1 cup water for 5-10 minutes. By this time the flakes will soak the water and turn soft.
Transfer the soaked moong, barnyard millet flakes, green chilies, ginger, salt, 10-15 curry leaves and cumin to a grinder jar.
Grind to a fine paste using little water. The pesarattu batter is ready.
To make the pesarattu, heat a non stick tawa /pan . Put a ladle full batter at its center. Spread it into a circle using the back of the ladle to make a thin pesarattu.
Drizzle some oil at the edges of the pesarattu and cook till golden brown in color. Flip and cook on the other side.
Serve the pesarattu hot with some podi or chutney of your choice.