Mix cream cheese, spinach, cheese, onion, jalapeno and mushrooms. Slice a pocket in meat, stuff mixture into each piece and seal with tooth picks or sew shut. Place egg, flour and breadcrumbs in separate dishes. Dip meat in individually in flour, egg and coat with crumbs. Sprinkle with parmesan and seasoning. Brown meat in skillet. Bake 35 to 45 minutes at 375 depending on thickness of meat. Internal temp should be 160 to be adequately cooked.
Mix jalapeno for hotter stuffing. use buttermilk to make egg mixture thinner.