1. Preheat your oven to 325°F (165°C). Position a rack in the lower third of the oven to ensure even roasting.
2. In a medium bowl, combine the softened butter with minced garlic, chopped rosemary, thyme, parsley, lemon zest, salt, and pepper. Mix until well blended. This is your herb butter – the star of the show.
3. Pat the turkey dry with paper towels, inside and out. This step is crucial for crispy skin—moisture is the enemy of crispiness.
4. Gently loosen the turkey skin over the breast by sliding your hand between the skin and meat, being careful not to tear it. Spread about two-thirds of the herb butter under the skin, covering as much breast meat as possible. Rub the remaining butter all over the outside of the turkey.
5. Season the cavity of the turkey with a pinch of salt and pepper, then stuff it with the quartered onion, carrots, and celery. These aromatics will infuse the meat from the inside out.
6. Place the turkey breast side up on a rack in a roasting pan. Pour the chicken broth or water into the bottom of the pan to keep the environment moist and catch drippings for gravy.
7. Cover the turkey loosely with foil and roast for about 2.5 to 3 hours, or roughly 15 minutes per pound. Halfway through cooking, remove the foil to let the skin brown and crisp up.
8. Use a meat thermometer inserted into the thickest part of the breast without touching bone. When it reaches 165°F (74°C), the turkey is done.
9. Remove the turkey from the oven and let it rest for at least 20 minutes before carving. This resting period allows juices to redistribute, keeping the meat tender and juicy.

Pro tip: When I first tried roasting a turkey, I was tempted to skip the resting step, but I quickly learned it makes all the difference between dry and succulent meat. Patience pays off in the kitchen, especially with poultry.