Wash the bean sprouts thoroughly and remove excess water.
Cut the thinly sliced pork belly into bite-sized pieces.
Spread the bean sprouts evenly in the pan.
Place the pork belly slices on top of the bean sprouts.
Season with salt and pepper.
Cover with a lid and steam over medium heat for 5 minutes.
When the bean sprouts and pork are cooked, sprinkle sesame seeds and chopped green onions.
Serve with dipping sauce if desired.