I don’t believe Ravai Idly is native to Tamil Nadu, though Tamil Nadu is famous for its rice idlies. I have no recollection of my mother ever making ravai idlies. I came across ravai idlies only in cookery books. This dish uses curds to prepare the batter, and as I used to rack my brains for ways to utilise the leftover curds at home, I decided to give this a try. I was very pleased with the flavour of the idlies and the substantial breakfast they made.