A Premium Canature Duck Breast Fillet 110 to 550 grams. The fat under the skin makes the duck breast fillet extra tasty. Cut the skin crosswise before preparation to prevent the fillet from curving. Duck breast fillet is delicious for smoking, grilling or pan-frying. When grilling, first lay the fillet skin-side up to prevent the charcoal from burning. In the pan, fry the fillet on the skin first. The fat will melt because of the heat, so you fry the duck breast fillet in its own fat.