To start, cut the flank steak into thick strips against the grain. Now, mix the cornstarch with the beef broth. Then, pour into the crockpot.
Add in the soy sauce, and minced garlic and crumble the bouillon cube over the top. Now, add in the steak strips.
Put the lid on and cook on high for 3 hours or low for 5-6. After about 1.5 hours, give everything a stir then continue cooking.
When you are at the last hour of cooking, add in the chopped broccoli. Allow the broccoli to finish cooking the last hour in the slow cooker.
Once everything is finished cooking, stir in the honey and the sesame oil as the final touch. Taste for salt before serving and enjoy.