Position a rack in the center of the oven and heat the oven to 350°F. Put the turkey parts in a small roasting pan (approximately 9x13 inches) along with the onion, celery, and carrots and roast until the meat is well browned, 1 to 1-1/4 hours. Transfer the turkey parts and vegetables to a 4-qt. saucepan.
Add the wine to the roasting pan and scrape any browned bits with a wooden spoon to release them into the wine. Pour the wine into the saucepan and add the chicken broth, herbs, bay leaves, and peppercorns. Bring to a boil over medium-high heat, reduce the heat to medium low or low, and simmer gently until the meat is falling off the bone, 30 to 40 minutes, skimming occasionally to remove the fat and foam that rise to the top. Strain the broth through a fine sieve, cover, and refrigerate until ready to use. Remove any solidified fat before using.
Make Ahead Tips
The turkey broth can be made up to 4 days ahead and refrigerated or up to 2 months ahead and frozen.
Photo: Scott Phillips