Mix the chilli powder, hing & little salt. Make a thick paste. Drain any water from the fish and add to the paste. Apply the paste to all the sides of the fish. Set aside for another 10 minutes.
Spread the rice flour rava mixture on the plate, take individual fish pieces that is already dipped in chilli paste and roll it and set aside. Do this with all the pieces. Set aside for 5 minutes.Heat oil in a kadai for deep frying. Fry the fish on both the sides till deep red.