01 - Preheat oven to 375°F.
02 - Pat turkey breast dry with paper towels. Place on a rack in a roasting pan.
03 - In a small bowl, mix olive oil, rosemary, thyme, sage, garlic, salt, pepper, and lemon zest to form a paste.
04 - Gently loosen the skin of the turkey breast and rub half the herb mixture underneath the skin. Rub the remaining mixture over the top of the skin.
05 - Arrange lemon and onion slices in the roasting pan. Pour chicken broth into the pan.
06 - Place the turkey breast skin-side up on the rack over the aromatics.
07 - Roast for 1 hour 10–20 minutes, or until the internal temperature reaches 165°F. Baste with pan juices once or twice during roasting.
08 - Remove from oven, tent loosely with foil, and let rest for 10–15 minutes before slicing.