Wash the napa cabbage thoroughly and cut it into quarters.
Prepare the thinly sliced pork belly.
Pour water into the steamer and bring it to a boil.
Place the napa cabbage on the steamer first.
Spread the pork belly slices evenly over the napa cabbage.
Cover with a lid and steam for 7–10 minutes.
Serve with sauce of your choice if desired.