Cut the napa cabbage kimchi into bite-sized pieces.
Prepare thinly sliced pork belly (pork belly shabu shabu cuts).
Add the pork belly to a pan and stir-fry.
When the meat is halfway cooked, add the kimchi and continue stir-frying together.
Add gochugaru (Korean red pepper flakes), soy sauce, and minced garlic, then keep stir-frying.
Once all the ingredients are well mixed and cooked, turn off the heat.
Drizzle with sesame oil and sprinkle sesame seeds to finish.