I have some bread crusts (ends from rustic style woodstove-baked loaves) that I need to use up. They're about 3 days old now, but I've kept them sealed up so they haven't dried out. They're moderately dense, with very chewy crusts. I don't know how to use them! Bread pudding is my only idea (or the boring stuff, dipping in soup or making croutons), but I'm having friends over for an informal dinner tonight and I'd love to turn them into some sort of interesting main dish, maybe a casserole? Any ideas out there? Please help!