Sunday Brunch Casserole

3 Tbsp butter (softened)
1 loaf french bread
3 cups shredded cheddar cheese
3 cups milk
8 eggs
1 onion (chopped up)
1 tsp salt
1 tsp pepper
1 tsp dry mustard
1 lb. cooked bacon crumbled

The night before:
Slice bread into 1 inch slices and butter bread with butter, then slice into 1 inch cubes. Spread bread evenly throughout a greased 9 by 13 inch pan. In a large bowl combine and mix the rest of the ingredients and pour over bread. Refrigerate overnight (or at least 8 hours). Bake at 325 degrees uncovered for 1 hour. Bake until puffy and golden brown.
This recipe is from my friend Monica. We have as of last Christmas made this part of our Christmas morning breakfast tradition along with the pluck-it bread. It was nice because I could make it the night before so all I had to do Christmas morning was pop it in the oven and the same thing for the pluck-it bread we also eat oranges.