Heat the oil in a large frying pan or wok over medium heat then cook the garlic in the hot oil until fragrant, 1 to 2 minutes. Mix in the bok choy then cook and stir until the green parts of the leaves turn bright green and the stalks become slightly translucent, 5 to 8 minutes. Sprinkle with salt to serve.
Bok choy is known as bok choi, pak choi and pak choy. It is sold at Countdown as pak choy.
If you can not find baby bok choy, use 4 heads of regular bok choy.