Wrap the ginger, coriander seeds, cloves, peppercorns and onion in a 28 x 40 cm piece of muslin. Tie the muslin with butcher’s twine, leaving a few extra centimetres to secure the pouch to the pot. In a soup pot, combine them stock, salt and fish sauce. Secure the herb pouch to the soup pot, making sure it’s completely submerged in the stock, and bring it to a boil over medium-high heat. Decrease the heat to medium-low, cover and simmer for 20 minutes. Remove and discard the spice bag. Taste; you may want to add a bit more fish sauce.
Meanwhile, in a large bowl, soak the rice noodles in warm water until softened, about 10 minutes. Bring a large saucepan of salted water to a boil, add the noodles and cook for 3 minutes, or just until tender. Drain well.
To assemble, divide the noodles and chicken among 6 bowls, ladle in broth to cover and top with the spring onions and coriander. Serve with a plate of the bean sprouts, mint, basil, jalapeño and lime wedges alongside. Or store in an airtight container in the refrigerator for up to 5 days or in the freezer for up to 3 months.
Replacing fresh chicken stock with water and bouillon cubes fundamentally alters the depth of this soup, shifting the result from a rich, aromatic broth to a thin, flat liquid that fails to absorb the toasted spices properly. Building a complex broth relies on extraction, which is why enclosing aromatics like ginger, cloves, and coriander seeds in muslin is a traditional technique for keeping the liquid clear while maximizing surface contact.
Judging Noodle Doneness Without a Thermometer
Testing thin rice noodles requires abandoning timers and relying strictly on tactile evaluation. Submerge the soaked noodles in boiling water for exactly 3 minutes, then extract a single strand with chopsticks and bite it. Proper doneness is achieved when the noodle offers slight resistance at the absolute center without tasting chalky or breaking apart into a mushy paste.
Dietary Adaptations and Dietary Flexibility
Adapting this dish for different dietary requirements involves simple swaps. Fish sauce can be replaced with an equal measure of light soy sauce for a vegetarian profile, though the distinct umami depth will shift noticeably.