Add a bit of sesame oil in a really hot pan and sear it on both sides. Make sure it's nice and golden.
Add the soy sauce, garlic and ginger and let it cook with a lid on until al dente.
If the pan is still full of juices then remove the bok choy first and let the juices boil down. If not, remove all at once.
Garnish with sesame seeds and serve.