Here is something easy to do with a loaf of bread that is too hard to eat. There is one stipulation however. You have to be able to slice it with a knife.
Cheesy CroutonAdapted from Chef John
Old bread, sliced or fresh bread sliced and toasted
Lightly butter bread slice on one side. Top with cheese. Place in oven and broil until cheese is melted and bubbly. Use a cookie sheet to catch any melting cheese if desired. Watch carefully as not to burn the cheese or bread.
Place in the middle of a bowl of soup. I used my cheesy crouton with cream of broccoli soup, made without the cheese.