Nora got me hooked on this every Christmas with my wife’s family.
1 lb. bulk or link sausage: crumbled, browned & drained (double this amount for bacon)
6 slices white bread: remove crust, dice
2 cups milk
4 eggs, beaten
1 tsp dry mustard
1 tsp salt
1/4 lb. grated American or cheddar
Mix all of the above and refrigerate 12 hours, or overnight. Pour into greased 8×12 or 9×13. Cover with foil and bake in pre-heated oven at 325°F for one hour. Remove foil and continue to bake 15 minutes.