A Second Cooker

I wanted to make a more portable cooker.  This time I used plywood, plexiglass, and foam board from our local Valu Home Center.  The black paint is Rustoleum high heat black spray paint.
This has been an ongoing project.  Today I tried cooking in two cookers.
I tried reflectors out of foam board, but the heat softened the tape holding it together, and the ever present breeze blew it off the cooker.
So my highest temperature, 200 deg. F., occurs for an hour each side of solar noon.  My goal is still to improve the temperature.
I cooked a serving of instant oatmeal from 9 am t 11:30 am, and then some instant cream of wheat in the afternoon.  Also a baked apple.