Mix red chilli powder, turmeric powder, coriander powder, ginger paste, garlic paste, rice flour, curry leaves, lemon juice, salt and two tablespoons of oil and apply uniformly on the fish.
Rest it for an hour in the refrigerator. Heat oil in a pan and shallow fry on medium high heat for three minutes on either side or till fish is completely cooked and golden brown. Do not crowd the pan, fry few pieces at a time. Drain and place them on an absorbent paper.
Serve hot with lemon wedges.