Wash and soak Urad dal for 3-4 hours.
Drain water completely and transfer to mixer and grind. Just sprinkle some cold water if required and grind to a thick, smooth batter.
Whilst keep oil for heating.
Chop onions, green chillies, greens and add to the batter. Add asafoetida, salt, rice flour mix everything.
Once oil is hot enough, wet your hands, take a big lemon size batter in right hand ,weigh and make round, at the centre of the batter press from thumb to make a hole and slowly slide into hot oil.
Fry on medium high heat till it turns nice golden colour.
Serve hot with coconut chutney and sambar.