Heat oil in a pan.
Once the oil is hot, stir-fry green onions, minced garlic, and small chili pepper.
Then, add the diced mushrooms and mix well.
Next, add 1 tbsp oyster sauce, 1 tbsp dark soy sauce, 1 tbsp light soy sauce, 1 tsp salt, 1 tbsp water, and 50ml cornstarch slurry. (Before pouring the cornstarch slurry, give it a good mix once more.)
Continue stir-frying for about 10 seconds until the sauce thickens.
Prepare your serving plate and arrange the bok choy nicely.
Place the mushrooms at the center of your bok choy for a decorative touch.