About 2-3 hours before roasting, remove the turkey from the brine. Pat the turkey dry very well using paper towels. Grab your roasting pan. Place the turkey on the rack, breast side up, and dry off any remaining wet spots. Place the roasting pan with the turkey in the fridge, uncovered, to dry while you prepare your herb butter.
In a small mixing bowl, add the softened butter, fresh, minced garlic, rubbed sage, ground rosemary, dried thyme, celery salt, black pepper, poultry seasoning, and onion powder. Mix really well until combined into a paste.
Remove the turkey from the fridge and pat dry once more to get all the remaining liquid off the surface of the turkey. Stuff the quartered onion, head of garlic, fresh rosemary, and fresh thyme into the center cavity of the turkey, then tie the legs together with twine.
To the basin of the roasting pan beneath the rack, pour in the water and broth. Add the neck and giblets to the bottom of the pan, if you choose to use it for the gravy. Preheat the oven to 425°F.
While the oven preheats, use your hands to loosen the skin of the turkey from the meat. Take half of the herbed butter mixture in your hands and spread it underneath the skin, covering as much surface area as you can. Spread the rest of the herbed butter mixture on the exterior of the turkey, covering the whole thing as best as you can.
Place the buttered turkey in the preheated oven for 30 minutes, uncovered. After 30 minutes, lower the temperature of the oven to 325°F, and loosely cover the pan with aluminum foil. Let the turkey cook for 3 more hours if it’s a small bird, and 4 more hours if it’s a large bird. (The rule of thumb is about 12-15 minutes of cook time per pound of turkey.)
Check the turkey 1 hour prior to when you expect it to be ready, and make sure the bottom of the roasting pan still has plenty of liquid in it. You’ll know it’s ready when the thick part of the breast reaches an internal temperature of 165°F, and the thigh/leg part about 170°F. Many turkeys have a thermometer that will pop, but I recommend checking it yourself as well.
Optional step, but once it’s ready, remove the foil and baste the top of the turkey with some olive oil. Let it sit under the broiler for a few minutes (watch closely so it doesn’t burn) to get a crisp skin with a beautiful, shiny golden-brown color.
Remove the turkey from the oven, and transfer it to a large cutting board to rest for about 25-30 minutes. Keep it loosely tented with foil to retain warmth. Save the juice from the bottom of the pan to make a turkey gravy. Learn how to make one here.
Place the turkey on a large serving plate and line it with herbs, lemon slices, and any other garnishes you see fit. Carve out slices to serve and enjoy!