In konkani, we call this fish “Shetka” ( I think in English it is called Perch).
Ingredients to make a masala paste:
1 tbsp coriander seeds
½ tspn cumin seeds
7-8 pepper corns
½ tsp turmeric powder
3 short chilies + 2 long chilies
½ marble size tamarind
2 garlic flakes
Grind all the above to form a fine paste
2 tbspn Oil
½ sliced onion
½ tspn Salt (or as desired)
1 unripe Mango sliced
5 palm size fish pcs (Perch fish)
1/2 cup thick coconut milk
1.In oil, fry the onions, when turns brown, add the grounded masala and fry for 2mnts. You may add the remaining water from the blender.
2.Add salt and mango sliced pcs and cook for 2 mnts.
3.Add fish and cook till done and add thick coconut milk
4. You may add onion seasoning if required.
Ref :Homemade Culinary