One of my favorite parts of this pie is removing the bag from the pie. As you slowly pull of pieces of the bag some of the fantastic buttery crust will come off and you can peel it off of the bag and snack on it so no one knows you already had a taste when you bring out the pie. And Finally a picture of a slice of pie. Bet you wish you had a piece right now!
Update - I have had a lot of people asking for a recipe for this and trust me I wish I had one. I did find this http://www.foodnetwork.com/recipes/gale-gand/apple-pie-baked-in-a-bag-recipe/index.html
and in the comments people have suggestions but I don't think that Elegant Farmer will ever give up the recipe.