1.Cut napa cabbage crosswise in 1/2 or 1/3 and place in pot stand up.
2.Put sliced pork belly on top of cabbage.
3.Add 100 ml mirin, salt, and pepper.
4.Optionally can also put some bok choy and/or mushrooms on top to steam.
5.Put on medium heat for .
6.Make dipping sauce: combine 3 tbsp soy sauce, 0.5 tbsp sesame oil, 0.5 tbsp gochugaru, 1 tbsp sweetener, 1 tbsp vinegar, 1 tbsp minced garlic, and 1 tbsp sliced serrano pepper.