Preheat your oven to 325°F (165°C).
Remove the turkey giblets and pat the turkey dry with paper towels.
In a small bowl, mix together the softened butter, olive oil, salt, black pepper, garlic powder, onion powder, thyme, rosemary, and sage until well combined.
Gently loosen the skin of the turkey over the breast and thighs using your fingers. Spread half of the herb butter mixture under the skin and the remaining half all over the outside of the turkey.
Stuff the cavity of the turkey with the quartered lemon and onion.
Place the turkey breast side up on a roasting rack in a large roasting pan. Pour the chicken broth into the bottom of the pan.
Roast the turkey in the preheated oven for about 13-15 minutes per pound, or until the internal temperature reaches 165°F (75°C) when measured in the thickest part of the thigh.
Baste the turkey with the pan juices every 30 minutes for extra moisture.
Once cooked, remove the turkey from the oven and let it rest for at least 20-30 minutes before carving. This allows the juices to redistribute.