Korean Spicy Seafood Noodle Soup

Step 1

Peel and finely mince all 6 garlic cloves and set aside. Grate a 1-inch piece of fresh ginger on a microplane and set aside separately.

Step 2

Dice the medium yellow onion into 1/4-inch pieces — aim for uniform size so they cook evenly. Cut the medium carrot into thin matchsticks or diagonal slices, about 2 inches long.

Step 3

Slice the green onion tops (scallions) on a sharp bias, separating the white and light green parts from the darker green tops — keep them separate for layered flavor. Pat the shrimp and squid completely dry with paper towels — removing moisture helps them cook quickly without releasing too much liquid into the broth.

Step 4

Set a large, heavy-bottomed pot (at least 4-quart capacity) over medium-high heat. Pour in 3 tablespoons of extra-virgin olive oil and let it heat for 1 minute until it shimmers — a drop of water should sizzle on contact.

Step 5

Add the minced garlic and grated ginger, stirring constantly for 30 seconds — you'll smell an intense, fragrant aroma. This toast releases their essential oils and builds depth.

Step 6

Add 3 tablespoons of Korean red pepper flakes (gochugaru), stirring vigorously for 1 minute to bloom the chili flavor in the oil. The mixture should smell spicy and slightly toasty — if it starts smoking, lower heat slightly.

Step 7

Pour in all 6 cups of seafood or vegetable broth, stirring to incorporate the spicy base. Bring to a full rolling boil over medium-high heat, scraping the bottom with a wooden spoon to release any browned bits — they add flavor.

Step 8

Add the diced onion, carrot matchsticks, and the white and light green parts of the scallions. Stir in 2 tablespoons of soy sauce, 1 tablespoon of fish sauce, 1 tablespoon of rice vinegar, and 0.5 teaspoon of sugar — taste and adjust if needed. Simmer for 4-5 minutes until the vegetables soften slightly but still have bite.

Step 9

Gently add the 0.75 pounds of shrimp and the 0.75 pounds of squid rings, stirring gently to distribute evenly. The shrimp and squid will release liquid as they cook — this is normal. Simmer for 2 minutes until the shrimp just begins to turn pink at the edges.

Step 10

Add all 1 pound of cleaned mussels, pushing them gently into the broth. Increase heat to medium-high and bring to a vigorous simmer — the high temperature helps mussels open faster. Cover with a lid and cook for 4-5 minutes, stirring gently halfway through.

Step 11

Uncover the pot and check that the mussels have opened — discard any that remain firmly closed, as they were dead before cooking. The shrimp should be fully opaque, and the squid should be tender and just cooked through. Season with 0.5 teaspoon of kosher salt and 0.25 teaspoon of black pepper, tasting as you go.

Step 12

Scatter the reserved darker green scallion tops and 0.25 cup of fresh cilantro or perilla leaves (if using) over the surface — these add brightness and aroma right before serving.

Step 13

Ladle into individual deep bowls, ensuring each gets an equal share of shrimp, squid, and mussels, plus plenty of the spicy broth. Serve immediately while steaming hot — the heat brings out the full spice and the broth's umami depth.