Or you can do what we did in the service.....wrap your food in tin foil and put it somewhere around the engine block. When you get to a stopping point, the food is cooked! lol

Truckstops have all the 12v toys you could want or need, but be careful what ones you get. Here is a link that has many of the toys, along with a 12v microwave. Also depends on how much you want to spend.

http://www.skingco.com/convenience/f...cook_appli.htm

I used to put it in with the blacktop when i hauled it that worked great. When you got to the job you jumped up and shoved off the little bit of blacktop and it is really really hot ready to go. :P