Take a break from cooking on the grill or leave it at home altogether. Instead, consider building an outdoor oven using several rocks collected from your campsite. Cooking with hot rocks is an easy, convenient camping technique that works well when preparing fish, steaks and other foods you would place on a traditional grill at home.
To cook with hot rocks, start by building an outdoor oven out of a cardboard box and aluminum foil. Cover all sides of the box with foil, including the flaps on the open side that will serve as oven doors for you later. The shiny side of the aluminum foil should face up to maximize convection heating. Heat the rocks in your campfire for several minutes, then place them in the bottom of the box. Position a metal rack on top of the rocks, and place your food inside the oven, closing the flaps of the box to cook. Clamp a metal utensil or prop campfire wood on top of the flaps to keep them from opening and allowing any heat to escape. Monitor your food carefully, and cook your meal thoroughly. When everything is ready to eat, be sure to use your oven mitt and tongs to carefully remove your food from the hot door flaps of your cardboard box oven.