Firstly, take moong bean and raw rice in a wide vessel
Wash well and add enough water to soak
Furthermore, add green chilli and cumin seeds. Soak for at least for 8hrs in cold water or 5 hours in hot water)
Save the soaked water and transfer the soaked ingredients into the mixie jar
Furthermore, add ginger powder, salt, and 1/2 cup of water and grind into a smooth batter
Additionally pour extra water to make a dosa batter consistency
Heat dosa pan on medium heat and once when the pan is hot, sprinkle little water and add 2 ladles of Pesarattu batter and make Pesarattu dosa
After the pesarattu is half cooked sprinkle onion and coriander leaves and drizzle oil
Cook pesarattu and serve hot with ginger chutney