Cardboard Oven
Put alluminium foil every where in side a carboard box that is 2 foot square along inside walls cut a hole at the bottom of box. Get charcole nice and white then place about 6 of them in the middle of the hole this will get the inside the box around 350 degrees.i allways use a meat thermoniter threw the box so you can control the temperature.I cooked frozen pizzas this way i even baked cakes this was while camping primative. It freaks people out when you can bake a cake or roast when the thermomiter temperature stays around 350 degrees when it starts dropping temperature add coupple coals to bring it back up.