To Make Stock
Place Stock ingredients and water into a pot, bring to boil. Skim off any impurities. Simmer for about 15 mins. Strain out vegetables and anchovies, discard. Set stock aside.
To Make Noodle Soup
Bring the stock to a boil again and add zucchini, carrot, soy sauce, fish sauce, salt and pepper.
Add in the noodles and vongoles (optional). Cook until the noodles are cooked and the shells of vongoles have opened. Add spring onions towards the end of cooking time.
Serve noodles in individual bowls with seasoned soy sauce.
Tips
You can use chicken stock instead of making the anchovies stock.
You can add precooked noodles to stock to have a clearer soup.