Preheat oven to 350° F. Put bell pepper halves in boiling water and boil for 5 minutes, then rinse in cold water. Saute celery, onions, green onions and garlic in cooking oil until tender. Remove cloves of garlic. Add butter or margarine, crab meat and shrimp. When heated through, add chopped parsley, then Mozzarella cheese, Parmasan cheese, salt, pepper and Tabasco, stirring until cheese is melted. Add bread and mix well. Stuff pepper halves and top with buttered bread crumbs. Place in 2 large oblong casserole dishes. Pour a small amount of water and olive oil around peppers and bake for 1 hour.