Preheat oven to 350 degrees F (175 degrees C). Rinse and wash turkey. Place turkey in a roasting pan. Sprinkle parsley, minced onion, and seasoning salt over the turkey.
Cover with foil, and bake in the preheated oven 3 1/2 to 4 hours, until the internal temperature of the turkey reaches 180 degrees F. For the last 45 minutes or so, remove the foil so the turkey will brown nicely.