Prepare the bok choi by washing it well and chopping it into bite-sized pieces. Splash a little of the water into a wok or deep skillet, heat, and throw in the garlic and ginger. Sauté for about 3 minutes and then add the bok choi and the remaining water and stir. Cover and cook until the bok choi is bright green and tender-crisp, about 4-6 minutes.
Remove the cover and add the sesame oil, soy sauce, sugar, and rice wine. Stir and serve, sprinkled with toasted sesame seeds.