Next time, maybe sprinkle dry bread crumbs on the bottom before baking? (epicurious.com)
The tea sandwiches were mostly big wedges of dry bread with a smear of strange - flavored filling. (seatguru.com)
But if you are wanting to use gluten free bread, or a particular bread of your choice and you have the time then definitely make your own dried bread cubes. (houseofyumm.com)