This looks like a fun little project that I think people here would enjoy! I have a little stack of tin foil takeaway boxes that I could use for this. Just need to get hold of the plexiglass (or the oven bag they suggest, but I’d like to do it entirely with reusables if possible).
EDIT: Grammar.
I got really confused about the whole some brand name oven plastic thing, until a little text at the end said “Plexiglas also works.”
I know you mention it in your text but it didn’t really click due to the unfamiliar brand and the very concept of an “oven bag”.
Yeah, I was similarly baffled!