Slice unpeeled squash in ½″ slices. Arrange in bottom of 3-qt. baking dish. Place chicken, skin side up, over zucchini.
Add orégano to Basic Red Sauce; pour evenly over chicken and zucchini.
Bake uncovered in hot oven (400°) 30 minutes. Baste chicken and zucchini with drippings; bake another 30 minutes, or until chicken is tender. Sprinkle with cheese a