Christmas Breakfast Casserole

Crumble sausage into a medium skillet.

Cook over medium heat until evenly brown; drain.

In a medium bowl, mix together mustard powder, salt, eggs, and milk.

Add the sausage, bread cubes, and cheese, and stir to coat evenly.

Pour into a greased 9×13 inch baking dish.

Cover, and chill in the refrigerator for 8 hours, or overnight.

Preheat the oven to 350 degrees.

Cover, and bake for 45 to 60 minutes.

Uncover, and reduce temperature to 325 degrees.

Bake for an additional 30 minutes, or until set.

Cut and serve.