That's quick thinking, looks delicious. It sounds like you could use a solar oven.
I looked into solar ovens during our first or second summer here, I think, and decided against one. I’m sure I could learn to use one, but instead we’ve opted to try to cook using minimum energy indoors (bread maker, electric skillet, pressure cooker, crock pot). When something really needs oven-type heat, we have a gas grill outside that we can use. When it’s super-hot outside, though, I like to minimize how many times we open the doors during the late afternoon when the heat is most intense. Last I checked it was 102 outside. Ugh.