The process involves making a precise incision along the neck, usually on the dorsal side, to "unzip" the cylindrical skin. From there, the cook must separate the skin from the trachea and esophagus. This is the crux of the difficulty: the trachea is attached to the surrounding tissues by a web of fascia. Removing it intact, without puncturing the crop or tearing the delicate skin, is a test of knife skills and patience.
However, separating this skin from the underlying structures—the esophagus, the trachea, and the jugular veins—requires a delicate touch. The trachea, or windpipe, is the central column of this operation. In culinary circles, particularly in high-end butchery, the trachea is often removed to clear the way for the harvest of the neck skin. Yet, in "duck quack prep," the trachea is not merely waste; it is the focal point of a meticulous cleaning process. duck quack prep