In a small skillet, saute egglant in butter until tender, about 5 minutes. In a large skillet, cook the beef, onion, celery and garlic over medium heat until meat is no longer pink; drain. Add the eggplant, tomato sauce, parsley, oregano, salt & pepper; bring to a boil. Remove from heat.
Prick pastry sehll with a fork. Add beef mixture. Bake at 375º for 20-25 minutes. Sprinkle with cheese. Bake 5-10 minutes longer or until cheese is melted. Let stand for 10 minutes before cutting.