Oven-Barbecued Turkey

I found this in Woman's Day magazine. I have not tried this recipe, but I'm posting it for safe keeping.

• Ready In: 4 hrs 15 mins
• Serves: 12
• Yields: 1 turkey

Ingredients

• 12  lbs turkey, thawed if frozen
• 2  teaspoons salt, divided
• 1⁄2 teaspoon pepper, divided
• 1⁄4 cup butter or 1⁄4 cup margarine, melted
• 1  cup catsup (Ketchup)
• 1⁄2 cup cider vinegar
• 1⁄4 cup  packed brown sugar
• 2  tablespoons  instant minced onion
• 2  teaspoons dry mustard

Directions

1. Rub turkey inside and out with 1-1/2 teaspoons salt and 1/4 teaspoon pepper. Bake in roasting pan in preheated 325 oven, basting occasionally with pan drippings, 2-1/2 hours.
2. Meanwhile mix well remaining ingredients including 1/2 teaspoons salt and 1/4 teaspoons pepper. Spoon off pan pan drippings; reserve. Baste turkey with sauce mixture and continue roasting and basting 1- 1 1/2 hours longer (cover areas that brown too quickly with foil) or until thermometer inserted in thickest part of thigh (away from bone) registers 180 and drumstick moves easily.
3. Remove turkey to platter and let stand 20 minutes before carving. Strain pan drippings; remove and discard fat. Add defatted drippings ton sauce, heat through and serve with turkey.