I love curries, and the beef (instead of chicken/pork/lamb) is a nice change. Adjust the curry to your taste, I like mine pretty strong! You could use ground sirloin, too, and serve it over mashed potatoes...sounds weird but both of the end results are fabulous!
This is a simple way to prepare baby bokchoy, yu choy, or any other choy you can get your hands on! I was given this one by the same asian folks in Canada who taught me everything Chinese/ Vietnamese I know.