Add carrots, celery, fennel, onion, garlic, bay leaves, parsley, thyme, sage sprigs, peppercorns, turkey neck and turkey giblets, if using, to a large pot.
Add chicken broth. If needed, add enough water to just cover veggies and turkey, about 2 cups.
Bring to a gentle boil over high heat, then reduce to medium-low. Simmer until ingredients have imparted all their flavor, about 2 to 4 hours.
Strain through a fine mesh into a large measuring jug. Discard bones, vegetables, and meat.
How to Store It
Turkey broth can be made, cooled and refrigerated up to 5 days ahead.
How to enjoy it
Use leftover herbs stems from our stuffing recipe in place of whole sprigs. Celery and fennel scraps can also be subbed in.