3 cups cubed white bread (leftover homemade or store bought is fine)
2 cups half and half or milk
10 eggs
2 cups diced ham
2 cups shredded cheddar cheese
1 teaspoon ground mustard
1 teaspoon salt
1 teaspoon black pepper

Spray a 9 x 13-inch baking dish with cooking spray. To the baking dish add the cubed white bread. Evenly sprinkle the diced ham and shredded cheddar cheese over the bread pieces.

In a large bowl, combine the half and half or milk, eggs, ground mustard, salt and pepper. Stir until well combined. Pour the mixture over the bread, ham and cheese. Cover the casserole with foil. Refrigerate overnight (or 1-2 hours if making the same morning).

Bake the casserole, covered at 375 degrees Fahrenheit for 50 minutes. Uncover and bake an additional 15 minutes, or until the top is golden brown and bubbly and a knife inserted into the middle of the casserole tests clean.