Mix together all the ingredients for the sauce with 1 tbsp water in a small bowl and set aside.

Cook the dried noodles following pack instructions, then set aside.

Place a large wok over a high heat and add the oil. Tip in the peppers and carrots and fry for a few minutes until lightly browned. Mix in the chicken and stir-fry until slightly golden, around 2 mins. Add the cooked rice noodles and toss to combine. Pour in the sauce and add the cashews, then continue to stir-fry until everything is well coated and a little sticky. Finish with a sprinkling of chilli flakes, if using, spring onions and the chopped coriander.