Top one slice with the banana slices, covering most of the surface.
Place the second bread slice on top to close the sandwich. Slice it in half if you want and place the sandwich inside a lunch container.
Pack your favorite sides, like fresh fruit and veggies, in separate compartments If packing a dip, use a small, spill-proof lidded container. And, if packing dry snacks or sides, like crackers, pack them in their own compartment or container to prevent them from getting soggy.