01 - 
                Preheat oven to 325°F (165°C).
              
              
              
                02 - 
                Rinse turkey thoroughly under cold water and dry completely using paper towels.
              
              
              
                03 - 
                Spread softened unsalted butter evenly over the turkey, ensuring to work some under the skin.
              
              
              
                04 - 
                Sprinkle salt, ground black pepper, dried thyme, and dried rosemary over the entire turkey and inside the cavity.
              
              
              
                05 - 
                Stuff the cavity with quartered onion and, if desired, prepared stuffing.
              
              
              
                06 - 
                Pour turkey broth into the base of the roasting pan surrounding the bird.
              
              
              
                07 - 
                Roast turkey in preheated oven for 13 to 15 minutes per pound, basting every hour with pan juices.
              
              
              
                08 - 
                Insert a meat thermometer into the thickest part of the thigh. The internal temperature should reach 165°F (74°C).
              
              
              
                09 - 
                Allow turkey to rest for at least 20 minutes before carving and serving.