Can make with big fish,like Sheri,hamooor, king fish...I made with Sheri.... First marinate with chilli powder,termuric powder and salt and fry it and keep aside.  Make masala, add little oil and add onion chopper or sliced,ginger garlic paste,tomato,and add little chilli powder,termuric powder,coriander powder,jeera powder,and add little water and 1 piece of kodambuli. And let it cook and after that add fried fish... At last garnish vith., in a pan add cocknut oil add mustard seed...