Wash the mini cabbage thoroughly and cut it into appropriate sizes.
Prepare the thinly sliced pork belly.
Pour water into a steamer and bring it to a boil.
Place the mini cabbage at the bottom of the steamer and lay the pork belly slices on top.
Season with salt and pepper.
Cover with a lid and steam over medium heat for 10 to 15 minutes.
Serve with ssamjang (Korean dipping sauce) or chojang (vinegar chili sauce) if desired.