Rub the masala evenly onto the fish pieces with your hands (wear gloves if you don’t want you hands to turn yellow with the turmeric powder), or you could use two spoons. Massage it well onto the flesh — the salt and turmeric help get rid of the fishy smell.
In a shallow or a deep pan, pour enough oil to form a 1/2 centimetre layer on the pan — a thin layer of oil should do.