Cook hash browns. In a 2-quart saucepan cook sausage over medium heat, stirring frequently, until no longer pink; do not drain. Sprinkle 1/2 cup of GF Bisquick over sausage, stir in to blend. Gradually stir in milk until well blended. Stir in sage and pepper. Cook about five minutes, stirring frequently, until thickened. Serve hash browns with sausage gravy.