In a medium saucepan cook sausage over medium heat until browned, using a wooden spoon to break up meat as it cooks. Add butter to saucepan. Stir until butter is melted. Stir in flour, 1/4 teaspoon black pepper and 1/8 teaspoon salt. Cook and stir 1 minute. Whisk in milk. cook and stir until thickened. Cook and stir 1 minute more.
Split each Cheddar Biscuit. Serve sausage mixture over split biscuits. If desired, garnish with fresh sage.