Overnight Omelet Sandwich Recipe -- Mr Breakfast

Only problem....pre-planning breakfast the night before * 8 slices white bread - crust removed * 4 slices American cheese * 4 slices ham - sliced in 1-inch strips * 3 eggs * 1 and 1/2 cups milk * 1/2 cup corn flakes cereal - crushed * 1 Tablespoon butter - melted * 1/4 teaspoon salt * 1/4 teaspoon dry mustard