Had left overs tonight from a similar recipe based on yours. Mine had baby bok choy, broccoli, onions, mushrooms, cut baby corn, and fresh water chestnuts, ginger and garlic (and of course extra chili for me). The wine and black bean garlic sauce was very nice together.
How do you clean your baby bok choy? I put water in the sink, and swish them around. The sand settles to the bottom. Yi taught me that method.