This deliciously tasting soup is easy to make. You can find a video instruction of this recipe on my Youtube channel "Cooking with Dorus".
Serve the soup with the two lime pieces and some chilli sauce.
Serious vegetarians can replace the prawns with fried tofu cubes and the fish sauce with light soy sauce. Add these together with the mushrooms. The shiitake mushrooms can be replaced with other mushrooms like chanterelles. The paksoi and carrot can be wholly or partially replaced with other crunchy vegetables like Chinese cabbage, pepper or fennel. French beans or sugar peas are also tasteful in this dish. When you this you have to adapt the cooking times.
Use a tasteful noodle for this dish. I prefer Japanese soba noodles. Don't overcook the vegetables. The pak choi has to stay crunchy.