In a large skillet combine your ground beef, onions and green bell pepper.

Cook over medium high heat until meat is browned.

Drain off any grease.

Add the meat mixture to your slow cooker.

In a small bowl combine your cornstarch, beef broth, worcestershire sauce, salt and pepper.

Add the broth mixture to the slow cooker and stir to combine.

Cook on low 4-6 hours.

15 minutes before serving add in the cheese to the slow cooker.

Cover and let cook 15 minutes or until cheese is melted.

Stir to combine.

Place the meat on soft buns and serve!!