Plan 1, side view of the solar cooker

here's a rough plan from the side-view for my future solar cooker.
units are just imaginary, right now I am thinking they represent centimeters. but we'll see.
And here's the plan 2 (cutting plan).
I tried making a model out of paper and tin foil because the model was too small it wasn't able to generate heat that would burn but it was bright where I expected it to be.
I have calculated and estimated that it would be like cooking with about 70 times regular sunlight (so don't put your face in the cooking area and look, DANGER, will probably instantly blind you).