Lemon Sponge Pie

My family and I were traveling around Lancaster County, Pennsylvania one summer and we stopped in a little bakery in Bird-in-Hand. The pie of the day was Lemon Sponge. They were so pretty I bought one. I asked for a plastic fork so I could taste it when I got in the car...The pie didn't last past the "tasting", we had to go in and buy another one. Best Pie ever.