*To bake the french toast as a casserole, follow the directions through the steps of assembling the stuffed bread slices. Then grease a 9x13 inch baking dish and arrange the stuffed bread slices in the dish. In a bowl, whisk together the eggs, milk, vanilla, cinnamon and salt until combined, then pour evenly over bread slices. Wrap tightly with plastic wrap and place in the refrigerator for anywhere from 30 minutes to overnight. When ready to bake, take the casserole out of the fridge for at least 10 minutes while preheating the oven to 350 degrees F. Make sure all bread slices are evenly coated in egg mixture (redistribute the egg mixture if necessary). Bake casserole for 30-35 minutes. If top starts browning too quickly, loosely place tin foil over the top of the casserole for the last 10 minutes or so. Serve as directed above.