Combine all the ingredients in a slow cooker. Add 1 cup water. Cover and cook on low 8 hours.
Uncover. Skim any fat from the surface. Transfer the beef to a cutting board. Let cool slightly. Slice or shred into bite size pieces.
Divide barley vegetable mixture among bowls. Top with beef.
Go to full version of
Slow Cooker Beef and Barley recipe