Prepare the Turkey Breast. Remove the turkey breast from its packaging and pat it dry with paper towels. Place the turkey breast on a roasting rack in a roasting pan. This helps the turkey cook more evenly by allowing air to circulate around it.
Season the Turkey. Rub the turkey breast with softened butter. This will help the skin brown and keep the meat moist. Season the turkey generously with salt and pepper. You can also add optional seasonings like paprika, dried sage, dried rosemary, and dried thyme for extra flavor.
Add Aromatic Ingredients. Place minced garlic, lemon quarters, fresh thyme sprigs, and fresh rosemary sprigs around the turkey in the roasting pan. These aromatics will infuse the turkey with wonderful flavors as it roasts.
Roasting. Place the roasting pan with the turkey breast in the preheated oven. Roast the turkey breast for about 20 minutes per pound. A 4-6 pound turkey breast will take approximately 80-120 minutes to cook. Use a meat thermometer to check for doneness.
Check Internal Temperature. Begin checking the turkey's internal temperature after about 1 hour of roasting. The turkey breast is done when it reaches an internal temperature of 165°F in the thickest part of the meat.
Resting. Once the turkey reaches the desired temperature, remove it from the oven. Tent the turkey loosely with aluminum foil and let it rest for about 15-20 minutes. This allows the juices to redistribute and ensures a juicy, tender result when you carve the turkey.
Carve and Serve. After resting, carve the roasted turkey breast into slices and serve with your favorite side dishes and gravy if desired.