On a clean, lightly floured surface, roll the sheet of puff pastry into a 1/8-inch-thick rectangle, about 10 by 14 inches. Sprinkle with half the grated cheese. Top with a single layer of sliced prosciutto, and sprinkle with remaining cheese. Starting with the longest edge, roll pastry into a tight log. Transfer to a baking sheet, and freeze 45 minutes or until firm enough to slice.Advertisement
Preheat oven to 425 degrees. Slice log into 1/4-inch-thick slices; place on baking sheet, and bake 5 minutes. Reduce oven temperature to 375 degrees, and continue baking until golden brown and cooked through, about 15 minutes. Cool on a wire rack, and serve.
Pinwheels can be made in advance, wrapped unbaked, and frozen up to three months. Bake shortly before serving. Since this recipe uses half a package of puff pastry, doubling it is easy.