Sprinkle both sides of pork chops with seasoning blend. In 12-inch nonstick skillet, heat oil over medium-high heat. Add onion; cook about 2 minutes, stirring occasionally, until slightly tender. Push onion to one side of skillet.
Add pork to other side of skillet. Cook about 3 minutes, turning once, until browned. Add tomatoes. Heat to boiling; reduce heat. Cover; cook 4 to 8 minutes or until pork is no longer pink in center.