Step 1: Dry and Season the Turkey - Pat the thawed turkey breast dry with paper towels, then place it into a five or
six quart slow cooker. Drying the outside helps the seasonings stick instead of sliding around on a wet surface. Sprinkle the salt, black pepper, garlic powder, and Italian seasoning all over the turkey. I like to use my hands here so I can make sure the seasoning reaches the sides and any little tucked away spots.