Best solution for sour kimchi : Kimchi Jjim Recipe - Sear all sides of the pork belly or shoulder until browned. (optional, this is for more flavor) - Once browned, add aged sour kimchi and pour enough water to fully submerge the ingredients - Cover and let it simmer on very low heat for 4 hours (or braise in a 160°C (330°F) oven for 4 hours) - After 4 hours, check the seasoning. If needed, adjust by adding water, salt, fish sauce, or soy sauce #kimchi #jjim #kimchijjim #sourkimchi