Sauté crawfish in butter for 5 minutes in medium saucepan. Remove tails to a separate bowl and set aside. In remaining butter sauté onion, green pepper, celery, garlic and mushrooms until soft. While this is cooking, season crawfish tails with the next 5 ingredients. Add seasoned tails and mushroom soup to saucepan and cook 15 minutes over medium heat. If mixture is too thick, it can be thinned with a little white wine. Spoon into each pastry shell until overflowing, and serve.