Cut or tear the chicken as evenly as possible into bite-sized strips or slivers and place them in a deep bowl. Cut the spring onions at a steep angle into thin slices. Mix them and the salt with the chicken. If using sesame seeds, toast them gently in a dry wok or frying pan for a few minutes, until they are fragrant and starting to turn golden, then tip out into a small dish

Combine all the sauce ingredients in a small bowl.

When you are ready to eat, pour the sauce over the chicken and mix well with chopsticks or salad servers. Arrange on a serving dish and sprinkle with sesame seeds, if desired.