We do, but as with most things it is more complicated than you think.
1.) You need to assess your solar resource. Do you get enough energy where your at to be useful?
For us we have magnificent solar resource. So it makes sense for us to do so.
Depending on your energy resource it may not make sense. You may be better off becoming an expert on below ground or pit cooking.
We have rocket stoves. But they have their issues too.
2.) Solar cooking takes constant monitoring. You gotta align to the sun all of the time.
3.) If your still into it then here is how we did it.
We took an old junk satellite dish and armature. Coated the inside of the dish with the shiny side of aluminium foil. And coated that again with clear polyurethane varnish.
Attached a plate to the armature where the satellite receiver normally sits. So that the focus point of the parabola dish is on the bottom of the plate. Then painted that plate flat back with engine high temp paint.
4.) Put this all on a simple X/Y axis using wing nuts that we can adjust to align to the sun.
5.) Depending on how you adjust the dish this can be very fast cooking. But it usually works best for slow cooking of stews and soups.
6.) There are people out there producing simple solar tracking setups that while they may seem expensive at first are really not when you look at the hassle involved with keeping it aligned.
All of the box style solar cookers that you find on the internet did not work very well for us. And I tried a bunch of them. They made great warmers but never really got up to a good temperature.
Hope that helps.
