Preheat oven to 350°. Cut sausage into 1/2-in. cubes; set aside. Place eggs, cream, dry mustard, salt and black pepper in a large bowl; whisk until smooth. Stir in sausage, 1 cup of cheese and green pepper. Pour egg mixture into a greased 13-by-9-inch baking dish. Bake 40 to 45 minutes or until eggs are set. Sprinkle with remaining 1/2 cup cheese. Let stand 5 minutes before serving.