First, I hollowed out a yellow onion:

Packed one half with ground beef:

Put the other half on top:

Wrapped it in foil (shiny side in is supposed to make it slightly hotter--who knows?):

Cooked on open coals for 20 minutes to a half an hour:

Then unwrapped it and ate it. Unfortunately, I was hungry and wolfed the thing down before I thought to take a picture of the delicious finished product. The vegetarians cooked eggs in their onions, which seemed to turn out all right.
But here's a picture of a nifty foil-and-stick frying pan that worked quite well:

We also made meatloaf on a stick by packing a paste made of ground beef, a crushed slice of bread, an egg, and salt and pepper on the end of a green stick, wrapping with foil, and setting it over the fire with a forked stick as a fulcrum, weighted at the base. It had to cook a little longer than the items in the coals--about 45 minutes. The meatloaf was very moist and tasty, but unfortunately it was a demonstration model, and there was only a little to go around.
[Edited to fix photobucket links, to add text, and to correct some spelling and syntax problems. Too bad I didn't do all of that before it went into the ZS feed!]
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