Sea salt grilled fish 1 large-sized fish 5 egg whites 3 kg sea salt Add the egg whites to the sea salt and mix well. Clean the fish from inside and pat it dry. Preheat oven to 220° C. On a roasting tray, spread a layer of salt. Place the fish over it and cover the fish properly with the remaining salt. Roast in the preheated oven at 220° C for 30-35 minutes. Cut into pieces as desired and serve hot.