Make a paste using all the dry spice powders, salt, crushed shallots and little water.
Marinate the fish pieces with this paste.
Keep it covered for 15 mins.
Heat oil in a pan. Layer it with curry leaves strands.
Place the fish pieces on top of the curry leaves.
Cook both the sides on medium flame till it becomes light brown and crisp.
Serve with chopped onions and tomatoes.