Baby bok choy is lovely! The start of my love of Asian greens lol. I like that it is so cute, easy to prepare, and tasty. There’s an americas test kitchen recipe that sautees them with chili garlic sauce; I eat that up so fast!
I don’t know if you’re into growing your own veggies but there are Asian greens seed pellets. The ones I got have a couple different kinds of choys and mustards in one pellet. I harvest the greens before they’re fully mature and are still tender. They’re so good fresh and I like the mixture.