Bring a pot of water to the boil
Prepare the sauce. In a bowl, add the soy sauce, Chinese black vinegar, peanut butter, garlic chilli oil, chilli flakes and water
Using a fork or small whisk, mix the peanut chilli sauce well, until it's a smooth consistency. You can add a little more water if you need to loosen the mixture
Cook the noodles according to the packet instructions, for knife-cut noodles around 1-2 minutes
Drain the noodles, then immediately add to the peanut sauce and combine
Make sure all the noodles are coated in the sauce
Divide into bowls, sprinkle over spring onions and sesame seeds
Drizzle with extra chilli oil/and or some sesame oil