Slice the pork thinly.
Wash the bean sprouts thoroughly and drain the water.
Julienne the onion and green onion.
Mix soy sauce, minced garlic, cooking wine, and pepper, and marinate the pork.
Layer the bean sprouts and onion in a steamer, then place the pork on top.
Add green onion, cover, and steam for 10 minutes.
Transfer the finished dish to a plate and serve.