mussels - 500g (cleaned and beards removed)
water - 500ml (for cooking pasta and broth)
spaghetti - 150g (dry pasta for 2 servings)
onion - 1/2 medium (thinly sliced)
tomato sauce - 1 cup (for the sauce)
pepperoncino - 2-3 pieces (dried chili peppers)
salt - 1/2 tablespoon (for pasta water)
scallions - watch the video to see (chopped, optional garnish)
black pepper - watch the video to see (to season)
olive oil - 4 tablespoons (for seasoning)
minced garlic - 1 tablespoon (for seasoning)
Korean red pepper powder (gochugaru) - 1 tablespoon (for seasoning)
rice wine (cheongju) - 2 tablespoons (for seasoning)
chicken stock cube - 1/2 cube (half cube, for seasoning)