Shredded Beef Sandwiches

INGREDIENTS

Arm roast
Large onion
1 Cup ketchup
1/4 cup lemon juice
3 Tbsp Worcestershire sauce
2 Tbsp vinegar
2 Tbsp brown sugar
1 tsp salt
1/4 tsp pepper
1/2 tsp liquid smoke

DIRECTIONS
Cut roast in 1/2; place in slow cooker. Top with onion. Combine next 8 ingredients; pour over roast. Cover and cook on low 809 hours or until the meat is tender. Remove roast and cool slightly; shred meat with two forks. Skim fat from cooking liquid. Return meat - heat through.