Fresh Ground Black Pepper and Kosher Salt to taste
Preparation:
Just after placing your turkey in the oven, melt 2 Tbs of the butter in a medium/large saucepan over medium-low heat
Add the turkey neck, giblets, and onion to the skillet and sauté (stirring frequently) until the giblets are browned (apx 15 minutes)
Once the giblets are browned, add 5 cups of the chicken broth, herb sprigs, and bay leaf to the saucepan and bring to a simmer (adjust heat as necessary)
Once simmering, cover and allow to cook (stirring occasionally) for apx 2 hours while turkey roasts (after 2 hours turn heat to low and keep warm until turkey is done if necessary)
Remove the neck from the broth (save for other use if desired) and strain the broth through a fine mesh sieve into a large bowl or other suitable container - Discard the solids
As soon as your turkey is roasted and removed from the roasting pan - Use the remaining 1 Cup of chicken broth to deglaze the baking pan using a rubber/silicone spatula to gently scrape up any bits from the bottom - Transfer to the strained broth
Return the saucepan to medium heat - Melt the remaining 8 Tbs (1 stick) butter - While constantly whisking, add the flour a little at a time until all incorporated to make a roux - Allow to cook (constantly whisking until golden brown (apx 4 minutes)
Whisk in the strained broth/drippings mixture a little at a time (make sure you whisk constantly to avoid lumps) - Bring to a simmer
Allow to simmer (whisking occasionally) until thickened (apx 10 minutes)
Adjust seasoning with salt and fresh ground pepper to taste
Transfer to a serving container and serve immediately with turkey