Mix the oats, rava, and curd well, add grated carrots, chopped green chillies, chopped coriander leaves, grated ginger, with enough salt in a big mixing bowl.
Meanwhile heat oil, fry the cashews for 2 minutes, now crackle the mustard seeds and urad dal in the same oil.
Add the curry leaves and add this tempering to the prepared batter and mix well.
Add the fruit salt and water to the batter and mix well.
The consistency should be like that of the pakode batter, neither too thick nor runny.
Keep aside for fifteen minutes.
Grease the idli moulds with oil and pour the idli batter in the moulds, steam for 10 mins in idli steamer on high flame.
Take the idlis out from the moulds and serve spongy and fluffy idlis to your loved ones with coconut chana chutney.