| In a large nonstick skillet, heat oil over medium-high heat. Add pork cubes and onion; cook and stir 3-4 minutes or until pork is nicely browned and onion is tender; set aside. Make dressing by shaking together orange juice, vinegar, salt, pepper and orange zest in a small jar with tight-fitting lid. In a large serving bowl, toss together the pork and onion, pasta, broccoli, cherries and walnuts with the dressing. Serve immediately.