Yes. I have one that I made myself. They're cheap to make and work very, very well. You can cook anything in them.Has anyone used the solar stove?
Two cardboard boxes, one that can fit inside the other with a bit of space in between.
Insulation of some sort to put between the boxes. Newspaper works well.
I painted the outside of my box with black spray paint. The kind used on barbecue grills.
I use an old, very large picture frame for the lid. Picture removed (of course) and glass still in it.
I picked up an oven thermometer for $3 at the store.