In a medium bowl, mix the softened butter with minced garlic, chopped rosemary, thyme, sage, lemon zest, salt, and pepper until well combined.
Pat the turkey breast dry with paper towels. Slowly loosen the skin from the breast by gently pushing your fingers underneath it, being careful not to tear the skin.
Take a portion of the herb butter and spread it generously under the skin of the turkey, ensuring to cover the breast area evenly. Spread any remaining herb butter on top of the skin.
Place the turkey breast in a roasting pan and add the chicken broth to the bottom of the pan to keep the turkey moist while roasting.
Roast the turkey breast in the preheated oven for about 1.5 to 2 hours or until the internal temperature reaches 165°F (74°C) (use a meat thermometer for accuracy).
Once cooked, remove the turkey breast from the oven and cover it loosely with foil. Let it rest for at least 15-20 minutes to allow the juices to redistribute before slicing.
Slice the turkey breast and serve with the pan juices drizzled on top.
Notes
Let the turkey rest before slicing to ensure juiciness.