This was excellent. My family loved it. I served it over i2 cups of instant brown rice. I will definitely make it again and try it with chicken breasts as well.
I put the cornstarch and beef in a bowl and tossed to coat.
Used Frozen Broccoli Florets, which gave off a bit more liquid, next time I will microwave separately and mix in with the beef at the end once the sauce has thickened.