Just bought a cast iron for our summertime camping adventures. Learning how to build a cooking efficient campfire from scratch was the ticket. Luckily my boyfriend knows how to build the perfect one. After an early morning of waking up and getting the fire started, a few hours later we had coals and our rocks heated to the perfect temperature. This bacon took only a few minutes to cook, on the surface of a rock mind you, in just a few minutes. Mmm, bacon.