Preheat oven to 350 degrees F.
In a medium bowl lightly blend leftover green bean casserole with milk, stock and turkey. Using the puff pastry, cut out 6 (4-inch) disks from each sheet. Lightly press the disks into the bottom and up the sides of 6 (1-cup) muffin tins, leaving about 1/2-inch crust over the edge to secure the top. Press the tines of the fork into the bottom and the sides to dock the pastry. Fill each cup level with the top and cover with another cut circle. Secure the edges by pinching together. Cut a small hole in the top for steam. Bake for 30 minutes or until crust is golden brown.