So, I tried
this recipe again today, substitiuting some chicken breast I wanted to use up for the pork, and it came out tasty that way too. Used a bit more meat than before (about a pound, since I wanted to use up chicken with a bit of freezer burn on it) and this time the bok choy was even bigger, so I cut the stem bits smaller. I also used a touch less of the chili paste.
Very tasty this way, as well!