Cut horizontal slits in thickest part of the chops to make pockets. Combine parsley, bread crumbs, seasoning. Set aside. Saute onion and garlic in butter for about 3 minutes. Add mushrooms and cook for 2 minutes, stirring. Add to parsley mixture.
Spoon stuffing into chops and secure with toothpicks. Place in a large oven proof dish brush with oil. Cover bake 1 hour at 325 degrees. Remove cover bake 30 minutes.