Here’s something I have been thinking about for some time.
A dehydrator. The picture says solar but it can actually be used over a wood stove by just using the upper box. The lower sloping box is just an air duct with a glass top. The inside will be painted black and the absorbed sun rays will heat the air. The heated air will rise up to the upper food rack box. Then the air and moisture will vent out the top at the back. To use it over a wood stove I will put a small fan to keep the air moving.
In the photo the dehydrator is not quite finished.