Cut the crusts off the bread and cut each slice diagonally into triangles.
Grease a large casserole dish with butter or cooking spray
Shred the cheddar cheese and alternate slices of bread with cheese to form between 3-4 layers of bread and cheese
Beat together 6 eggs and add 2 cups of milk and 1 stick of melted butter
Pour egg mixture over slices of bread and cheese
Cover and place in the refrigerator overnight - up to 24 hours
Bake for 1 hour at 350 degrees. Do not preheat oven if using glass baking dish.
Notes
You can use either a 9x13 pan or large round casserole dish. You can make this up to 24 hours in advance of baking. While you can bake it once it's assembled, it really is a lot better if you let it soak overnight!If you want to make a smaller "half size" batch, my mom uses 10 slices of bread, 4 eggs, 1 1/4 cup milk and a half stick of butter.