Instructions

  1. In a slow cooker, combine beef, green peppers and onions.
  2. In a small bowl, combine tomato paste, brown sugar, vinegar, chili powder, salt, Worcestershire and mustard.
  3. Stir into meat mixture.
  4. Cover and cook on high for 7 to 8 hours or until meat is tender.
  5. When done, skim fat from cooking juices.
  6. Shred beef, using 2 forks or kitchen shears.
  7. Use slotted spoon to place beef mixture on each bun (about 1/2 cup).