I went on line and found a wonderful solar oven that is working wonderfully for us. It is built out of plywood, insulation, masonite board, glass and foil. It isn't unusual for the temperature to reach 375 degrees during the highest sun. I just went outside to check on our dinner and the oven is holding at 350 degrees and it is 4:00 in the afternoon. I have cooked on partly cloudy days and the oven has done well as long as I get the food in early. I will admit that solar ovens need sun to work at their best but you might be surprised at how well they work even with some clouds. Google either solar ovens or cooking with solar and you will find lots of helpful information. I am blessed with lots of sun and plan to always use our ovens even in the winter. It's really nice not to have to heat up the house. Hope you can find a solar oven on line that will work for you. You can buy them commercially but they are a little pricey. I only spent around $50. Probably could have saved a lot more if I would have looked for scraps. Good Luck!!!!!