Kimchi Jjigae (Kimchi Pork Belly Stew)

Name: Kimchi Jjigae (Kimchi Pork Belly Stew)
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: Korean
Ingredients: 9 oz pork belly (thinly sliced); 1 tbsp rice wine (Korean rice wine (cheongju) or mirin); 1 medium onion (thickly sliced); 1 cup kimchi (aged, cut into bite-size pieces); 2 tbsp gochujang (chili paste); 2 tbsp gochugaru (chili powder); 3 cloves garlic (finely minced); 1 tsp sesame oil (drizzled before serving); 1 tsp cooking oil; 3 sprigs green onions (sliced); 10.5 oz tofu (medium-firm or soft, cubed (2cm)); 1 tsp salt; 3 cups anchovy stock; 2 tsp sesame seeds (toasted, for garnish); 2-3 tbsp kimchi brine (optional, recommended)