ROLL AND BROWN:
Line rimmed baking sheet with foil. Adjust oven rack to lower middle position and heat oven to 325 degrees. Remove pork from bag and pat dry with paper towels. Arrange pork, fat cap down, on work suface. Cover surface of meat with processed sausage mixture, leaving 1/2-inch borer on all sides. Roll tightly, then tie roast at 1-inch intervals with kitchen twine. Season with pepper. Heat reserved fat in skillet over medium high heat until just smoking. Brown roast on all sides, about 10 minutes. Transfer pork, fat side up, to wire rack set inside prepared baking sheet.