Cut the thinly sliced pork belly into bite-sized pieces.
Wash and prepare the mung bean sprouts, bok choy, onion, and mushrooms thoroughly.
Place the mung bean sprouts at the bottom of a steamer, then layer the bok choy, onion, and mushrooms on top.
Evenly spread the sliced pork belly over the vegetables.
Sprinkle soy sauce, garlic, pepper, or your preferred seasonings over the ingredients.
Cover with a lid and steam until all ingredients are cooked through.
Once cooked, transfer to a serving plate and serve.