Damn...why are sun-dried tomatoes so expensive at the supermarket when you can DIY!!
Do you have plentiful harvest form your garden or from the dumpster?? This is a great way to save fruit & veg for later use. DIY plans for a passive solar food dehydrator are listed on the link below.
http://www.motherearthnews.com/diy/solar-food-dehydrator-plans-zm0z14jjzmar.aspx#axzz34Boujpqv
Solar dryers are often used in developing countries (where alot of our supermarket food comes from) to produce value-added products, facilitate shipping and transport of goods, and increase farmers' incomes. Check this link for a detailed pdf of solar dryers in Zimbabwe!