Quick Chicken with vegetables

4 boneless skinless chicken breasts 1 red onion , large sliced thinly 2 zucchini , sliced about 1/2 inch thick 28 ounces diced tomatoes 8 ounces button[...]

1 medium green bell pepper , cut into strips 1 medium onion , sliced into rings 8 ounces fresh mushrooms , sliced 1 tablespoon olive oil 4 chicken breast[...]

1 medium green bell pepper , cut into strips 1 medium onion , sliced into rings 8 ounces fresh mushrooms , sliced 1 tablespoon olive oil 4 chicken breast[...]

4 (4 ounce) boneless skinless chicken breasts 2 tablespoons vegetable oil 1 medium onion , chopped 3 celery ribs , chopped 6 carrots , sliced thin 1 cup fresh[...]