when baking a frozen pot pie can aluminum foil/heavy strength be used in place of cookie sheet?
Almost anything you can use made out of paper/cardboard will burn before you get the the sandwich grilledNo plastic at all, it will be a messDo you have a small metal tray, or even a small metal pan/pot? can you borrow a piece of foil from a neighbor? That is a ruff spot to be in.
None of what you have will workAnything with plastic in it will melt and stick to the ironPaper will char or burn before the sandwich gets warm enoughYou need something made of metal.
Everything you mentioned will either burn or meltPaper burnsThose bags are just plasticPersonally, I'd even avoid the soda cans given the amount of paint on them You're just going to screw up your ironYou need metal, glass or ceramics Do your electronics have a metal case? You could do this with the classic metal shell of a computer stack.
Apart from the mess it is most likely make I would use the plates perhaps, but check what they are made of as my guess is that they will not be paper, but some sort of plastic, and that would be an no-no I am sure if the Dorm admin found out you tried that you may be invited to depart instantly H-man
Sure, as long as it's thick enough and cut wide enough to catch any spillage from the gravy bubbling overI would not count on it to support the pie as it is removed from the oven unless it's been layered enough to provide strengthPerhaps sliding it out on to a plate would work better.