Spread sausage on bottom of lightly greased 9 x 13-inch baking pan. Combine eggs, 2 cups cheese, margarine and cayenne pepper. Gradually add egg mixture to cooked grits; pour over sausage. Top with bell pepper, garlic and 1 cup of cheese. Bake at 350°F for 20 to 30 minutes. Let stand 5 minutes before serving.