In a small bowl combine 1 cup beef broth, 1/2 cup of soy sauce, 1/3 cup of brown sugar, 1 tbsp sesame oil & 3 garlic cloves, minced.
Pour over the beef. Cover and cook on low for 7 hours.
In a cup, stir 2 tbsp of cornstarch & sauce from the crock pot until smooth. Add to the crock pot & stir well.
Add as many fresh broccoli florets as you want. Stir. Cover & cook for 30 minutes. Serve over rice.