If you invite me to your house for dinner, this is probably the dessert I will bring. I get around town on my Rollerblades. When invited to dinner, I put a frozen pithivier in my backpack and I'm out the door. My friends are usually pretty disappointed when they see this flat, unbaked disk of dough. I smile and tell them to be patient. As the pithivier bakes, its mouth-watering aroma interrupts the conversation. By the time we finish dinner, the pithivier is done. What comes out of the oven is a beautiful golden brown dessert that is eight times its original height. My friends cannot believe the transformation.