Crumble sausage in a skillet & cook ever medium heat until evenly browned. Drain.

In a medium bowl, mix together mustard powder, salt, eggs, & milk. Add the sausage, bread cubes, & cheese - stir to coat evenly. Pour into a greased 9x13 baking dish. Cover, & chill in refrigerator for 8 hours - or overnight.

Preheat oven to 350 degrees.

Cover, & bake 50 - 60 minutes. Uncover, & reduce reduce temperature to 325 degrees. Bake for an additional 30 minutes, or until set.