the reason i'm asking is because i'd like to do some pre-assembled meals and throw them in the freezer for a later date. i thought about picking up some throw-away foil pans at the $1 store and putting them in there. but if the tomato sauce acidity would react funny to the foil pans, then i'll have to find another way of doing it. I'd like something that I can just take out of the freezer and stick into the oven, so i figured the throw away foil pans would work well. but i wasn't sure about the acidity thing, as i too read that youar en't supposed to store acid-type foods in aluminum. so i'm kinda stumped! i guess i could freeze the meal without the tomato sauce in it, then add it right before i stick it in the oven, no?