I saw it over at Parents.com
So, this is how we made ours...
Trim the edge of a paper plate rim with scissors to make it scalloped, like pie crust. Then, we used distressing ink to stain the outside of our plate to resemble the color of crust. We found cute leftover Halloween paper that we used to make our "pumpkin pie" and we cut a circle to fit the center of the plate.