Fish Kalia is a Bengali royal fish curry that is a must have dish on wedding menu(or any big occasion).
The preparation is really simple and easy. First fry (shallow-fry or deep-fry) the fish pieces in mustard oil and then put them in rich and delicious gravy.
The main requirement of this great fish curry is Rui/ katla fish ((a kind of fresh water carp), mustard oil, Indian spices, yogurt, cashew and poppy seeds paste. Without these ingredients fish kalia can not be outstanding. Yet you can make some variations if the ingredients are not around you.