01 - Preheat oven to 375°F. Place a rack in a roasting pan and set aside.
02 - Pat the turkey breast dry with paper towels. Gently loosen the skin over the breast with your fingers.
03 - In a small bowl, combine butter, parsley, rosemary, thyme, garlic, lemon zest, salt, and pepper to make an herb butter.
04 - Rub half of the herb butter under the skin of the turkey breast. Rub the remaining butter on top of the skin. Drizzle olive oil over the turkey.
05 - Arrange onion quarters, lemon slices, and herb sprigs in the bottom of the roasting pan. Place the turkey breast on the rack above them.
06 - Pour chicken broth into the bottom of the pan.
07 - Roast uncovered for 1 hour 10–20 minutes, or until the internal temperature at the thickest part reaches 165°F. Baste the turkey with pan juices every 30 minutes.
08 - Remove from oven, tent loosely with foil, and let rest for 15 minutes before slicing.