1In a large skillet, heat oil over medium high heat. Cook pork, breaking up with spoon, for about 10 minutes or until no longer pink. Drain fat.
2Stir in stock, onions, garlic, mushrooms, celery, salt, cinnamon, pepper, savory, and cloves; bring to a boil. Reduce heat to medium low. Simmer for 35 to 45 minutes, or until 2 tablespoons liquid is left. Stir in fresh bread crumbs and parsley. Taste, and adjust the seasoning to your liking. Cover, and refrigerate until cold. The filling can be stored for up to one day.
3Preheat oven to 375 degrees F (190 degrees C).
4Roll out pastry to about 1/8 inch thickness, and fit to pie plate. Spoon filling into shell. Roll out top pastry. Moisten rim of pie shell with water. Cover with top pastry, pressing edges together to seal. Trim and flute pastry edge. Beat egg with water, and brush over the top pastry. Cut steam vents in top.
5Bake in preheated oven until pastry is golden brown, about 45 minutes. Allow to cool for about 10 minutes before serving.