Shoyu Cabbage Soup

Name: Shoyu Cabbage Soup
Ingredients: 1 tablespoon vegetable oil; 1 medium onion, thinly sliced; 2 carrots, peeled, thinly sliced; 2 celery stalks, thinly sliced; 2 garlic cloves, chopped; 1 /2 head Napa cabbage, chopped; 4 cups low-sodium vegetable broth; 2 tablespoons (or more) shoyu (Japanese soy sauce); 2 tablespoons unseasoned rice vinegar; 2 teaspoons sugar; 2 cups cooked ramen or soba noodles; Hot chili paste (such as sambal oelek) and fresh cilantro leaves (for serving); Shoyu and hot chili paste can be found at Asian markets and in the Asian foods section of many supermarkets.