Place a wok or a heavy bottom pan on medium heat and add vegetable broth, coconut milk, Bruise lemongrass and kaffir lime leaves and add to coconut milk, add slices of galangal to it. Let simmer for a few minutes
Add onion, mushrooms, lotus root and beans. Let simmer for about 6-7 minutes til vegetables are nearly done.
Add salt, sugar (optional) and chillies. Mix and let simmer for 2-3 more minutes.
Turn off the heat. Add the lime juice. Give it a taste and if necessary add some more salt or sugar or chillies.
Serve with cilantro or Thai basil, some extra lime wedges and some Jasmin rice. Enjoy!