the biggest pan of al dente spaghetti noodles baked in tomato sauce and meatballs. giant bottle of tabasco. cans of Pibb dr pepper and real ginger beer (non alcoholic)
In Fantasyland where you can have anything you want? A bottle of Kentucky wheated-bourbon and a box of my favorite cigars. (I wouldn't smoke them all. I'd give one to anyone nearby who wanted one and we could all hotbox death-row. Also in case the one I got was plugged. That would be tragic.)
In reality where it's most likely that your meal is cooked by someone in the prison kitchen with locally sourced ingredients? Pizza.