Cut each chicken breast half crosswise into 3 pieces. In 10-inch skillet, heat oil over medium-high heat. Cook chicken in oil about 5 minutes, stirring frequently, until brown; move chicken to one side of skillet.
Add onion, garlic, bell pepper, zucchini and mushrooms to other side of skillet. Cook vegetables about 3 minutes, stirring occasionally, until crisp-tender.
Stir tomatoes, Italian seasoning and pepper into vegetables and chicken. Heat to boiling; reduce heat. Cover and simmer 25 minutes. Meanwhile, cook and drain pasta as directed on package.
Uncover chicken mixture and simmer 5 minutes longer. Serve over pasta.