Bring a large pan of water to boil.
Wash the bok choy and remove any tough stems.
Chop the bok choy into 3 equal portions.
Add the bok choy to the pan of boiling water.
Cover for 1 to 2 minutes or until just tender but still crisp.
Use tongs to remove the bok choy from the pan, drain well and place on a heated serving platter.
Heat the peanut oil in s small pan and cook the garlic briefly.
Add the oyster sauce, sugar, water and sesame oil and bring to a boil.
Pour over the bok choy and toss to coat.
Serve immediately.
