See my links below...
My goal here is to teach you (and myself) how to cook foods without use of fossil fuels. No wood chopping, no hauling propane tanks back and forth to the gas station to be filled, no electric bill. In times of societal collapse, power outages, rationing etc., I will be able to cook foods that I grow or have stored. Ahhhhhhh - self-reliance. Here is food BOILING in my own solar oven.
We can prepare healthy, flavorful, safe food.
Below are some commercial and homemade models. They are linked to their respective sites. Some have instructions for use and some even have plans. Look on Youtube for inspiration as well.
Here is an excellent link to get you started on Wikipedia http://en.wikipedia.org/wiki/Solar_cooker