I was playing the Sims Medieval the other day, and at one point, the blacksmith proves s/he's a capable cook by... taking a piece of meat, firing up the forge, and hammering the thing into a steak. It's obviously done tongue-in-cheek, but it got me thinking - is it somehow possible to use a forge (bellows, coal, anvil, the works) to produce something actually edible? If 'yes', what sort of constraints (e.g. necessary preparations, limitations on what kind of foods you could prepare) would there be? Putting aside issues of cost and practicality. 
Amateur blacksmith here. So, first, let me caution that two of the things that are around any forge are toxic chemicals like borax, and lots and lots of tiny metal fragments that would be very bad to get inside you.  So I don't recommend ever actually cooking around a forge. If you were to do so anyway, though, how you would do it is by heating a large flat piece of steel to red-hot in the forge, and then holding that steel above or below the thing you wanted to cook.  There's actually a standard medieval cooking tool called a salamander that works on this principle, just starting in a fireplace and not a forge. I cannot comment on whether anyone actually cooked this way at one or more ABANA meetings, given how unsafe it would have been to do so. 