wash and Soak the millet in enough water for 1 hour.
Drain the water and grind it to a coarse paste.
Heat coconut oil and crackle mustard seeds, urad dal, chana dal, red chillies, curry leaves and fry for few seconds.
Further, add chopped onions and fry until pale.
At this stage, add 2 cups water, salt to taste and let it come to a boil.
When the water is boiling, add the coarse millet paste and mix well until lump free.
Close and let it cook in simmer for 10-15 minutes Or until all the water is used up.
Open and mix until it combines together.
Let the mixture get warm enough to handle.
Grease your hands and make balls out of it.
Grease an idli plate and place the balls over it.
Steam cook for 10 minutes. Take out and serve hot with chutney and sambar.