Heat up vegetable oil in a wok over high heat.
Add sliced onions and garlic, and saute.
Add prawns and cook until slightly pink.
Add the chye sim stalks and spring onion sections and saute.
Add the soaked bee hoon and squid and toss together.
Pour in the fish sauce, sugar, shaoxing wine, white pepper and half the fish stock and stir.
Allow the noodles to simmer and absorb the liquid. Add more fish stock if needed.
Push the noodles aside, and pour in the beaten eggs. Scramble and stir to combine.
Stir in the chye sim leaves and sesame oil. Serve.