Preheat oven to 350°F. Arrange opened Cooking Bag in 13x9-inch baking pan or dish. Sprinkle Seasoning Mix evenly over chicken.
Place chicken in single layer in bag. Add vegetables. Sprinkle any remaining seasoning over chicken and vegetables. Close bag loosely with nylon tie. Cut 4 small holes in top of bag to allow steam to escape.
Bake in lower half of oven 1 hour. Remove from oven. Let stand 5 minutes. Cut open bag. Serve chicken and vegetables with pan juices. If desired, serve with prepared McCormick® Chicken Gravy.