Chrose and Pete, I've never actually seen Manifold Destiny, but I'm a devoted listener to Click and Clack, The Car Guys. They recently rebroadcast the segment when "That Martha Lady" was on with them, and she mentioned that you should never use aluminum foil like that. Something about Alzheimer's, but I forget .... In any case, maybe the answer is to do a real parchment en papillote and then wrap that in foil. But as I said, I have no car, so I had no idea it could be so complicated. Different in different parts of the US, and different countries, too, I guess. ;)