16 slices firm white bread
2 1/2 c. cooked cubed ham
16 oz. Cheddar cheese, shredded
16 oz. mozzarella cheese, shredded
6 eggs
3 c. whole milk
1/2 tsp. dry mustard, optional
1/4 tsp. onion powder, optional

Trim crusts from brad; cut slices in half. Grease a 13 x 9 x 2 inch baking pan and layer as follows: Cover bottom of pan with 1/2 of bread, 1/2 of ham and 1/2 of each of the cheeses. Repeat layers. Combine eggs, milk and seasonings. Pour over layers; refrigerate overnight. Remove from refrigerator 30 minutes before baking.

Combine 3 cups uncrushed corn flakes and 1/2 cup melted butter; sprinkle over casserole. Bake at 375 degrees for 45 minutes. Cover loosely with foil to prevent top from over browning. Let stand 10-15 minutes before cutting into squares.