Combine the sauce ingredients in a small bowl and place to one side.
Prep all the veg and have it ready to add to the pan. I like to pair them in order of cooking order: carrot and red pepper, mushrooms and white part of the spring onion, then mangetout and the green part of the onions.
Cook the noodles in boiling water as per the packet instructions. Drain in a colander then toss in a good drizzle of toasted sesame oil. Leave to one side.
In a large wok (or other suitable pan) add 1 tbsp oil over high heat. Season the sliced chicken all over with salt (1/4 tsp or so) and when the oil is hot, add the chicken to the wok. Fry until sealed on the outside and almost cooked through the centre, then add the chilli, garlic and ginger. Fry for another 30 seconds or so until the chicken is just about cooked through and the aromatics begin to take on colour (careful they don't burn). Take the wok off the heat and transfer the chicken and aromatics to a bowl to one side.
Add the wok back to high heat and top up with oil if needed. Once hot again, add the carrot and red pepper and fry for a couple of minutes until they start to lightly colour and soften very slightly. Add the mushrooms and white part of the onion and fry for another 1-2 minutes, then add the mangetout and green parts and fry for another minute, or until they soften slightly.
Add the noodles and the chicken and aromatics, then pour in the sauce. Give everything a good toss until the sauce soaks up and everything is evenly distributed. The noodles might be a little sticky at the start, but the sauce will loosen them up as you toss.
Serve with extra garnish and enjoy!