Rinse the bean sprouts in cold water and drain them well.

Cut the bacon into bite-sized pieces, halve the bok choy, slice the green onion, and thinly slice the garlic.

Heat oil in a frying pan and sauté the garlic and bacon.

Add the bean sprouts and bok choy to the pan.

Season with oyster sauce, sesame oil, and a pinch of pepper.

Stir-fry until the bean sprouts are slightly wilted but still crunchy.