A few years ago we became interested in trying to cook with the sun. Initially we'd planned to build something ourselves out of salvaged materials, but then some good friends gave us a Global Sun Oven as a gift. Since then we have used it practically every sunny, not too windy day, sometimes making three different dishes before the sun goes down. We cook rice, beans, bread, veggies, and cakes with this simple but very effective technology.
In the summer we now use 2/3 less cooking energy and the kitchen stays much cooler. We also use it extensively in the winter on sunny days. Although the cost of an "official" Global Sun Oven is way beyond our normal means, we must admit that it's a practical, efficient design. We also believe that a more economical and just as effective solar oven could be made with minimal material and know-how - search on "solar cooker plans" for lots of ideas!
For more recipes, please visit Alyce's Solar Kitchen.