Preheat smoker to 225°F. Make the poultry seasoning by combining the sage, thyme, rosemary, salt, marjoram, nutmeg and black pepper in a bowl.
Pat the turkey breast dry with a paper towel. Coat the turkey with the melted butter. Use your hands to rub the seasoning all over the turkey.
Smoke the turkey for about 3 ½ hours at 225°F or until the internal temperature reaches 165°F. Let rest for 15 minutes before slicing.
Notes
Use apple, cherry or maple wood for smoking. They all complement the turkey perfectly.
Make sure you rinse and then pat dry the turkey which allows for a crisp skin.
If you don't want to make your own herb rub, just use store-bought.
When the turkey reaches the correct temperature, cover loosely in aluminum foil for 15-20 minutes before slicing. Letting it rest keeps the juices in the turkey.