Put all the ingredients for the marinade in a food processor and blend until smooth. Season to taste, then pour over the sliced pork. You can now cook the meat straight away, but for best results allow it to marinate in the fridge for at least 30 mins.
Make the ssamjang sauce (if using) by mixing all of the ingredients together, then set aside.
Heat a griddle pan over a high heat and cook the pork in batches for
2-3 mins each side until charred and cooked through. Serve with white rice and a few lettuce leaves. To eat, place a small scoop of rice in a leaf, then a piece of pork, smear with ssamjang sauce (if using) and wrap up.