Prime Rib with Horseradish Sauce

PRIME RIB WITH HORSERADISH SAUCE

1 bone-in beef rib roast (4 to 6 lbs.)
1 Tbsp. olive oil
1 to 2 tsp. coarsely ground pepper

HORSERADISH SAUCE:
1 cup (8 oz.) sour cream
3 to 4 Tbsp. prepared horseradish
1 tsp. coarsely ground pepper
1/8 tsp. Worcestershire sauce

Brush roast with oil; rub with pepper. Place roast, fat side up, on a rack in a shallow roasting pan. Bake, uncovered, at 450 degrees for 15 minutes. Reduce heat to 325°. Bake for 2-3/4 hours or until meat reaches desired doneness (for medium-rare, a meat thermometer should read 145°; medium, 160°; well-done, 170°), basting with pan drippings every 30 minutes. Let stand for 10-15 minutes before slicing. Meanwhile, in a small bowl, combine the sauce ingredients. Serve with beef. Yield: 6-8 servings.