Heat oven to 350º. Spray shallow roasting pan with cooking spray. Place beef in pan. Insert meat thermometer so tip is in center of thickest part of beef. Roast uncovered about 40 minutes or until thermometer reads 140º (medium-rare doneness). Cover beef loosely with tent of aluminum foil and let stand about 15 minutes. (Temperature will continue to rise about 5º, and beef will be easier to carve as juices set up.) Cut beef across grain at slanted angle into thin slices.