Perhaps a flat lid, stone, street sign, or piece of metal, and a fire of some kind. You don't need an oven for bread made of flour and water.
Madness string 7121
I'm telling you, Teal'c, if we don't find a way out of this soon, I'm going to lose it. Lose it. It means go crazy. Nuts. Insane. Bonzo. No longer in possession of one's faculties, three fries short of a happy meal, wacko!