Cut off the stems from the bok choy, separate the leaves, then wash & shake off excess water.
Finely mince the garlic cloves.
Using a mortar and pestle, grind the roasted sesame seeds until at least half of it is in powder form.
Add to a mixing bowl with the remaining ingredients and gently mix together.
Serve right away or make it a couple hours ahead and store in the refrigerator.
Video
Notes
For the best results, try to find the freshest bulbs of Shanghai bok choy.
Don't skip the crushed sesame seeds. Trust me, some ground up sesame seeds really elevates the dish. Sometimes you can buy it like that, but I just use my mortar and pestle to grind it down.
Do not add more garlic than the recipe calls for. I'm guilty of doing this a lot- but in this case you really shouldn't. Raw garlic breath is no joke!
If you can't find Shanghai bok choy, you can use baby bok choy. These are a little darker green at the top with crinkly leaves.
This will hold in the fridge for only a couple of days. I do not recommend keeping it much longer than that.