How to Make It
Place trimmed roast in a 5-quart slow cooker. Combine soy sauce and next 6 ingredients; pour over roast. Add water to slow cooker until roast is almost covered.
Cook, covered, on low 7 hours or until very tender. Remove roast, reserving broth; shred roast with a fork. Place roast in rolls, and serve with reserved broth for dipping.