This is one option...the Sun Oven. Please know that there is more than one choice, but this one seems to be the most prevalent.
If you would like to see a Utahan use one, go to this link http://www.ksl.com/index.php?nid=148&sid=5845295 and view the video from KSL. This lady lives where we do and shows what can be done here.
The reason LRH is bringing this to the forefront right now is that there will be a demonstration on a very large Sun Oven this week. It will be held at:
260 S 1200 W
(Just off the Orem Center Street Exit South of Trafalga)
Wait!!!!! You can make you own!!!!!! See the information below: