Heat oven to 375°F. In 10-inch nonstick skillet, cook sausage over medium heat, stirring frequently, until thoroughly cooked. Drain; return sausage to skillet. Stir flour into sausage. Over medium heat, gradually add milk, cooking and stirring until bubbly and thickened. Stir in salt and 1/4 teaspoon of the pepper. Remove from heat; set aside.