Prepare noodles according to packet instructions, drain and set aside. The ones I bought were ready to heat and just needed to be covered with boiling water for 2-3 mins then drained.
Heat oil in a large frying pan or work over high heat. Add mince and cook, breaking it up and stirring, until browned. Add the onion and garlic and continue to stir-fry for 2 minutes, then add the mixed vegetables and stir-fry for 3-4 minutes or they're al dente.
Add soy sauce, oyster sauce, sugar, sesame oil and rice wine vinegar and cook for a minute or two, stirring. Lastly add the cooked noodles and mix until well-coated and sauce has reduced a bit and become a bit sticky.
Garnish with the spring onions and sesame seeds. If liked, serve with some Crispy Chilli Oil on top. This is available from Asian Grocery stores or in the Asian section of your supermarket.