Today’s miso soup is made with frozen seafood mix. Frozen seafood mix are widely available at supermarkets, and they typically include frozen shrimp, squid, and scallop. They are handy to keep in the freezer as we can add to various soup and stir-fried dishes. In this recipe, we also added onion and napa cabbage, but you can use any vegetables you have at home. Hearty and flavorful soup is ready in 15 minutes!