Mix the teriyaki sauce ingredients in a small bowl or jug and set aside. (skip if using store bought teriyaki sauce)
Cook the noodles according to packet instructions and run them under cold water to prevent them from sticking together.
Put a wok or large frying pan on a medium to high heat and add half of the oil. When the oil is hot, add the salmon fillets, skin side down, and fry until the skin gets nice and crispy.
Then flip and cook for a few more minutes until cooked through and set aside on a chopping board with the skin side facing up and roughly chop into bite-sized pieces. (Note 11)
Add the remaining oil to the wok and fry the spring onions, chilli and ginger for a couple of minutes until fragrant. Then add the garlic and cook for a further minute.
Add the chopped carrots and cook for 2-3 minutes until they begin to soften, tossing continuously to ensure they cook evenly. Then add the Choi sum/greens and cook for a few more minutes until tender.
Add the cooked noodles to the wok/pan and toss until hot.
Pour on the teriyaki sauce and let it bubble and reduce slightly for a minute or two, then add the cooked salmon and toss everything together.
Serve immediately topped with sesame seeds and the green parts of the spring onions/scallions.