Make sure you don't burn the spices. Add the shredded onions and the fish. Cover the dish and cook at medium-hi heat. When the water has almost evaporated, add tomatoes, cilantro, and the onion leaves. Heat under low-medium heat till the oil starts to float.
Directions Cut the hilsa fish into darnes and wash well in cold water.
Apply turmeric and salt on the fish and set aside for 20 minutes. Dip the pieces of marinated fish in this masala and put in the steaming casserole of the pressure cooker. Pour four cups of water in the cooker and bring to a boil. Adjust the steamer casserole and steam under simmering temperature for 8 minutes. Take off the fire and release the steam.