Sauce
- 1 cup ketchup
- 2 tablespoon prepared mustard
- 1/4 cup cider vinegar
- 1/3 cup dark brown sugar
- 2 teaspoons Worcestershire sauce
- 1/2 teaspoon salt
- 1/4 teaspoon Tabasco sauce
Trim excess fat from beef. Preheat oven to 300°. Place a double thickness of heavy-duty aluminum foil 9x13-inch baking pan, large enough to wrap roast without touching roast. Place meat on foil in pan. Place the cream of mushroom soup and onion soup mix in a bowl. Combine all sauce ingredients in a saucepan; simmer for 2 minutes. Stir into the soup mixture; pour over meat. Seal foil tightly around the roast, leaving about 1-inch of space between beef and the foil. Bake for 3 hours or longer, or until meat is very tender. Let sit for 10 minutes before slicing. Serve with the sauce over rice or noodles, if desired.
Serves 6.