Barbecue Beef for Sandwiches

Ingredients:

2 1/2 to 3 lbs lean chuck roast or bottom round
1 1/2 cups ketchup
1/4 cup packed brown sugar
1/4 cup wine vinegar
2 tablespoons spicy mustard or Dijon
1 tablespoon Worcestershire sauce
1 teaspoon liquid smoke flavoring
1/2 teaspoon salt
1/4 teaspoon ground black pepper
1/2 teaspoon garlic powder

Place beef roast in crockpot. Combine remaining ingredients; pour over roast. Cover and cook on LOW for 8 to 10 hours. Remove roast, shred meat. Place shredded meat back in crockpot; stir to coat well. Spoon barbecued beef onto toasted sandwich buns and serve with extra sauce, if desired.
Serves 6 to 8.

From here.