16 slices firm white bread
2 1/2 c cubed fully cooked ham
4 c shredded cheddar cheese
4 c shredded mozzarella cheese
6 eggs
3 c whole milk
1/2 tsp. dry mustard
1/8 tsp. onion powder
3 c uncrushed corn flakes
1/2 c butter, melted
Trim crusts from bread; cut slices in half. Grease a 13 x 9 baking pan and layer as follows: Cover bottom of pan with half of the bread, half of ham and half of both cheeses. Repeat layers. Combine eggs, milk, mustard and onion powder; pour over layers. Refrigerate overnight. Remove from refrigerator 30 minutes before baking. Combine corn flakes and butter; sprinkle over casserole. Cover loosely with foil. bake at 375 degrees for 45 minutes. Let stand 10-15 minutes before cutting.