I used cross sections of a sourdough sesame baguette, hollowed out. To make sure the egg was fully cooked, I put a lid on the pan and then let them finish uncovered to get a crunchy bottom.
Nice. I'm glad it was tasty. (You don't have to @ someone when you reply to them. I get an inbox message either way. I'm not even sure you did it right. That's just a link to my profile as far as I can tell.)