I used fine mung bean noodles (or mung bean noodle threads), but you can substitute that with rice noodles. I also love to use lemongrass in my coconut soups because it adds a bright flavor. I purposely cut the lemongrass into large chunks so that it’s easier to fish them out of the broth. (They’re very woody and difficult to eat.) If fresh lemongrass is not easy to find, use 1 1/2 tablespoons of lemongrass paste. Do note that many store-bought lemongrass pastes are not vegan as they often contain dairy.