egg and sausage breakfast casserole

I made this the night before a breakfast potluck. I don't recommend doing that, it deflated. Was still delicious the next day, and one person commented it was good 2 days later. For presentation reasons, serve right away.

8 slices of wheat bread torn (i used rolls i had in the freezer)
8 oz cheddar cheese shredded
1/2 lb chicken sausage cooked and crumbled
6 eggs
3 cups milk
1/2 stick melted butter
1/2 t salt
1/4 t pepper
2 T dijon or grainy mustard
splash worsteshire sauce

mix bread, cheese, sausage into greased 13x9" pan. Beat eggs, cold milk, salt pepper, mustard, worsteshire and pour over bread and cheese and sausage. Drizzle melted butter on top. Refrigerate covered overnight. Bake uncovered 350 degrees for 1 hour till puffy and golden