12 slices bread, remove crust
3 c. milk
3/4 tsp. dry mustard
6 eggs, beaten
1 c. onion, chopped
1/2 lb. Velveeta or American cheese, cubed
1 1/2 c. ham, diced
3/4 tsp. salt

Layer 6 slices bread on bottom of greased 9 x 13 pan. Scatter ham, cheese, and onion over bread. Mix eggs, milk, salt, dry mustard. Set aside. Put remaining 6 slices of bread on top of ham, cheese, and onion. Pour egg mixture over bread. Cover, refrigerate overnight. Bake at 350 degrees for 45 minutes.