In medium sized bowl, mix together the beef broth, sesame oil, soy sauce, brown sugar, and minced garlic

Pour into slow cooker

Lay beef in the mixture and toss mixture of beef to coat

Cover with lid and cook on low, 4 hours

After 4 hours: in small bowl mix the cornstarch and water

Add broccoli to slow cooker

Pour cornstarch mixture in slow cooker and stir into liquid to combine

Place lid back on slow cooker and cook an additional 30 minutes

Serve on top of the cooked white rice or to the side of the cooked rice

Cover with lid and cook 30 minutes to cook broccoli and thicken sauce.