Place all your veggies (except one of the quartered white onions) evenly across the bottom of your roasting pan.
Place the turkey on top of the vegetables.
Use 1/3 of your butter mixture and rub under the turkey skin. You will need to break through the fascia to be sure you're covering as much of the bird as possible.
Place about 2 tbsp of the butter mixture, celery butts, and one quartered, white onion inside the body cavity.
Rub the remaining butter mixture all over the skin and body of the bird.
Cover the turkey with the cheesecloth, pressing it into the butter evenly around the bird.
Sprinkle any remaining herbs, salt and pepper over the vegetables.
Add enough broth to fill about 1/2 of the roasting pan.
Bake for 3 hours (approx. 13 per lb), basting every 15 minutes for the last hour.