Put the noodle nest in a bowl and cover with boiling water. Let stand for 2 minutes, mix briefly and drain the water. Place 40g of prepared noodles in a soup bowl (one nest of lucky boat noodles will do about 4-5 takeaway sized portions of soup). Set aside.
Put the light chicken stock, light soy sauce, sea salt, MSG and white pepper in a saucepan, bring to the boil then reduce to a simmer. Add the sliced chicken and simmer for about 3 minutes until the chicken is cooked through.
Pour the chicken soup over the prepared noodles in the bowl. Garnish with the sliced spring onion, drizzle with sesame oil (if using) and serve.