Wash and trim the bok choy leaves. Cut each leaf in half, separating the tougher stems from the leafy greens. Place stems first into a microwave safe bowl. Place leafy greens on top.
Cover and microwave for 2 minutes. Mix well, season with salt and cooking oil. Mix again. Microwave 1 minute increments until done (you can give the bok choy a good mix after each minute).