Use a grater or a grinder to grind the ginger and garlic.
In a mixing bowl, add grated garlic, grated ginger, Korean soybean paste, salt and black pepper. Mix well to form a paste.
Rub the paste onto pork belly and once done, put pork belly into a ziplock bag and squeeze as much air out as you can. Seal and place into the refrigerator for 10-12 hours.
Wash rub off of pork belly. Cut pork belly into 1/2" bite-size pieces.
In a skillet, add neutral cooking oil on high heat and bring up to temp.
Add pork belly and cook for each side for 1.5 - 2.5 minutes. Once cooked, drizzle some toasted sesame oil and remove from heat.