Method

Preheat oven to 325°F (160°C).

Place roast on rack in roasting pan; roast in oven for about 2-1/2 hours or until meat thermometer registers 160°F (70°C) for medium. Transfer to cutting board; tent with foil and let stand for 10 minutes before carving.

Chipotle Pepper Sauce:
Meanwhile, skim off fat from juices in pan. Place pan over medium heat; pour in beef stock, stirring and scraping up brown bits. Transfer to food processor. Add red peppers, chipotle pepper, Worcestershire sauce, salt and pepper; pur?until smooth. Serve with beef.