Soft boil an egg for 5 mins and set a side to cool. Prep your Pak Choi whist boiling the kettle. Open some noodles (Asian Supermarkets have the best). Boil the noodles with their sachet with the Pak Choi for 2 minutes. Chuck in a bowl and add some frozen prawns. Peel your egg and slice in half. Add Miso, fish sauce, rice wine vinegar, soy sauce and sweet chilli & mango sauce or whatever you like to the broth. A drizzle of sesame oil really works also.