Wal-Mart has what we called pie irons. We used to put a piece of bread on each side and then fill it with pizza toppings or pie filling, but really you could put anything fast cooking in them. You hold them in the fire for a few minutes and when its done you've got a cool personal pie. We used to do that a lot in Scouts.
And although its not something you can roast over the fire, I always enjoyed "hobo packs." We used potatoes and onions as a base then put a hamburger patty on top. Then you could add carrots or whatever other vegetables you wanted, then you just wrapped it up in aluminum foil and put it on some coals. I enjoyed those quite a bit in Scouts as well.