Directions:

Thaw pastry 20 minutes, then unfold sheets. Cut each sheet into 4 squares. In a large mixing bowl, thoroughly mix beef, celery, onion, parsley, sage, salt, pepper and stuffing. Stir in yogurt or sour cream until mixture is bound together. Shape mixture into 8 generous size meat patties. Broil patties on each side for 3-4 minutes or until brown. Cool. Drain on paper towels. On a lightly floured board, roll out each square of pastry about 1 1/2 inches larger than meat patties. Set the patties in center of square and fold pastry over meat, sealing edges in the center. Place seam side down on a baking sheet and brush with beaten egg. Bake in preheated oven ( 400 F. ) for 20 minutes. Serve hot or cold.