For an extra touch of flavor, consider adding a thin layer of Dijon mustard before layering the ham and cheese. Feel free to experiment with different cheeses, such as Gruyere or Swiss, for a unique twist. To prevent the bottom crust from becoming soggy, you can blind-bake it for 5-7 minutes before adding the fillings. This slab pie can be assembled ahead of time and refrigerated until ready to bake.