I have heard that you can just dig a hole in the ground, build a fire in it & keep it burning for an hour or so. Wrap the food in foil, leaves or a coating of clay and put it on top of the dying fire and fill in the hole. Let sit for 2 hrs.

I think you might have to have a trench leading into the fire hole while the fire is burning to provide enough oxygen.

I've been meaning to try this with a chicken. It's on my list.

Sue