Simple Roasted Thanksgiving Turkey {Oven Bag Method}

turkey (see note), neck reserved, giblets discarded

large white or yellow onion, coarsely chopped

large carrots, peeled and coarsely chopped (or about 20 baby carrots)

celery stalks, coarsely chopped

chicken broth

sprig fresh rosemary

bay leaves

butter

Coarse, kosher salt and pepper

all-purpose flour

turkey-sized oven bag (such as the Reynolds brand)

chicken broth (to add to the accumulated turkey juices)

butter

all-purpose flour

Salt and pepper