Make Stuffing: Heat pan, add olive oil, celery, onion, and garlic (or garlic powder). Cook until onions and garlic are softened. Add Italian sausage, break up the meat and cook until sausage is browned.
Roll & Bake Turkey: Preheat oven to 375°F.
Season top of tied breast with additional salt and pepper. Place the tied turkey breast in a baking dish.
Bake the turkey breast for 45 minutes. Remove from oven and place the remaining stuffing around the turkey. Return to the oven and continue baking for another 30 minutes, or until internal temperature of turkey reaches 165°F at turkey meat thickest part. Allow to rest for about 5-10 minutes, then slice and serve.