Preheat oven to 375°F. Arrange chicken and vegetables in single layer in 13x9-inch baking dish sprayed with no stick cooking spray. Top with pasta and cream cheese.
Mix stock, milk, 1 cup of the Cheddar cheese, flour and spices in bowl until well blended. Pour over pasta in baking dish. Cover with foil.
Bake 40 minutes. Remove foil and carefully stir. Sprinkle with remaining 1 cup Cheddar cheese. Bake, uncovered, 10 to 15 minutes longer or until cheese is melted. Let stand 10 minutes before serving.