PREHEAT oven to 375°F. Pour sauce into 13x9-inch baking dish. Carefully stir in 4 Tbsp. (1/4 cup) of the Parmesan cheese. Add chicken; turn over to evenly coat both sides with sauce. Cover with foil.
BAKE 30 min. Uncover.
TOP with mozzarella cheese and remaining 2 Tbsp. Parmesan cheese; continue baking 5 min. or until chicken is cooked through and cheese is melted.
This was so much easier than the chicken dinner I had planned, plus it used up some items lingering in my fridge. It was super easy and really tasty too. I served it with garlic bread and steamed corn. I believe I used either three or four cheese spaghetti sauce.