Add 2 tablespoons of canola oil, add garlic and ginger cook until fragrant. Then arrange the Bok Choy cut side down on the hot wok surface. Sear for 1-2 minutes, or until the cut surface is quite brown and tender.
Sprinkle the sugar over the stir fry.
Add the water, cover and reduce the heat to low until the sauce beings to thicken. Cook for 2 minutes.
Remove the cover and add oyster sauce. Season with salt and pepper to taste. Transfer to a plate.
Notes
Tips: If you prefer more tender Bok Choy, increase the cooking time till desired level.