Heat a large non-stick frying pan or wok, then fry the beef for 10 mins until very well browned. Don’t add any oil. Meanwhile, boil the noodles following pack instructions, then drain.
Add the ginger, garlic, five-spice, chilli powder and mangetout to the browned mince, then fry for a few mins more until fragrant and the pods are bright green. Splash in the stock, add the noodles, then season with the soy sauce. Pile into bowls (use tongs, it’s easier), sprinkling with the sesame oil and red chilli if using.