In a large skillet, brown beef in oil on both sides. Transfer to a 1-½-qt. slow cooker. In a small bowl, combine the broth, tomato sauce, wine, onion, garlic, parsley, rosemary, salt and pepper; pour over beef. Cover and cook on low until meat is tender, about 8 hours.
Remove beef and keep warm. In a small saucepan, combine cornstarch and water until smooth; stir in cooking juices. Bring to a boil; cook and stir until thickened, about 2 minutes. Serve with beef.
