why can't you freeze the lasagna pan? What I would do would be to line the glass lasagna pan with parchment paper enough that it completely comes up the sides, and freeze it. once it's frozen you can take the lasagna and paper out of the pan, wrap it up/put it in a bag and keep it frozen, and take the pan out and slowly let it come back up to room temp. when your ready to cook, pop the lasagna ice cube into the pan (with the paper), and put it in the oven.
if you really really can't freeze the glass (vs can't leave it frozen, or can't freeze liquid in it, or can't freeze it then pop it in the oven), then I'd do the same thing in the aluminum pans. line them totally with parchment, freeze, though I might not bother to take them out of the pans. the parchment will keep the food from touching the aluminum.
don't use wax paper, as you can't cook it. parchment paper can be used in the oven. it's pretty widely availible here, if not, it's lightweight and I'm sure you can get it online with not too much shipping.