Trim fat from pork chops. Place chops between two sheets of heavy-duty plastic wrap, and flatten to 1/4-inch thickness, using a meat mallet or rolling pin.
Combine breadcrumbs and Parmesan cheese in a small bowl. Dip chops in egg substitute; dredge in breadcrumb mixture.
Coat a large nonstick skillet with cooking spray; place over medium heat until hot. Add chops, and cook 1 to 2 minutes on each side or until browned. Arrange chops in an 8-inch square baking dish coated with cooking spray. Pour spaghetti sauce over chops. Cover and bake at 350° for 25 minutes or until chops are tender. Uncover; sprinkle with mozzarella cheese. Bake 5 additional minutes or until cheese melts. Serve immediately.