Another boon to the camp cook is aluminum foil. Potatoes, onions, turnips, apples, or medium-sized heads of cabbage-any vegetables, in fact-double-wrapped in regular-weight foil, can be safely cooked in about an hour. When I use foil, I build a big fire as soon as I get to camp, then wrap the vegetables individually and line them up around it. A dab of butter or bacon grease with each one is a good idea. I core the apples and fill the holes with anything good available, preferably butter, sugar, and cinnamon.