Roast uncovered in 325 degree oven until meat thermometer registers 170 degrees, 2 to 2 1/2 hours. Garnish with frosted grapes if desired. (To frost grapes, dip in water, then roll in sugar.)

NOTE: Roasts are easier to carve if allowed to set 15-20 minutes after removing from oven. Because meat continues to cook after removal from oven, it should be removed when thermometer registers 5 degrees lower than desired doneness.