In a small bowl combine broth, soy sauce, and brown sugar until dissolved
Place beef in slow cooker with sauce on top
Add sesame seeds and minced garlic
Cook on low for 6-8 hours
Mix corn starch with 4 T of sauce from slow cooker in a bowl
Add mix back into the slow cooker, stir gently
Add room tempature broccoli to the slow cooker
Cook on High for 40 minutes or until broccoli is cooked
Serve over white rice or your favorite fried rice recipe