*President's Choice brand stores have a product available in the bread section called PC Tramezzini White Crustless Bread, that is long slices of crustless bread, so that's an easy get for those who have access. If you don't have access to these type of bread slices, fear not! Simply buy an unsliced loaf of bread (or two, if you are doubling the recipe and freeze. Just before making this dish, remove the bread from the freezer and allow to thaw just to the point you can cut it easily, then remove the crust and slice in to 4 or 5 1/2-inch thick long slices. Cutting it partially frozen will make it easy to cut thin, even slices. Allow to thaw completely before continuing with preparing the dish.
Be sure to read the "Cook's Notes" in the original post, for more tips, options, substitutions and variations for this recipe!