Put the noodles in a large bowl and cover with just-boiled water. Leave to stand for 2 mins, then drain in a sieve and spread out onto a clean tea towel. Pat and press until as dry as possible, then transfer to a bowl. (If you have time, leave noodles to dry on a second clean tea towel for 10–15 min
Mix all the ingredients for the curry sauce in a small bowl until thoroughly combined.
Place the prepared vegetables in a semi-circle on a board or plate, starting with the onion and ending with the shredded leaves, ready for cooking sequentially. Have the bowl of noodles and the sauce ready to hand.
Heat ½ tbsp of oil in a wok on a very high heat. Add the red onion and stir-fry for 10–15 seconds, then add the carrot and stir-fry for 10 seconds more. Add the spring onions and stir-fry for a further 10 seconds before adding a little more oil and the shredded leaves. Stir-fry for 10–15 seconds mor
Add another teaspoon of oil, wait for the wok to be smoking hot, then toss the noodles in the middle. Fry for a few seconds, then bring the veg from the sides onto the noodles and stir-fry together for about 1 minute.
Finally, add the curry sauce and stir-fry with the noodles and veg for 20–30 seconds more. Divide between two bowls, scatter over chives or spring onions and red chilli to serve.