
Bring the anchovy and kelp stock to a boil over medium heat. Add the soy sauce, minced garlic, and salt to season the broth. Once the stock reaches a rolling boil, add the zucchini, carrots, and shiitake mushrooms. Cook for about 2 minutes, or until just slightly softened. Then add the clams and prawns, and continue boiling for another 2 minutes, or until they’re just cooked through. Avoid overcooking, as the seafood can become tough and gummy.
(Ideally at the same time as Step 1) In a separate pot, boil the noodles in rapidly boiling water for 2 to 3 minutes, or until cooked. Drain and rinse under cold running water, then set aside.
Add the noodles to the soup pot (from Step 1) and boil for about 1 minute to warm them through. Give them a gentle stir. Add the green onion, then turn off the heat. Serve hot.