Heat the oil in a saucepan over medium heat and add the ground beef. Break the beef apart while cooking and brown slightly.
Stir in the grated ginger and soy sauce, cooking for about 10 to 15 seconds to develop flavor.
Pour in 1 cup of water and sprinkle the white pepper powder, cover with a lid and let it gently simmer for 10 minutes. Add water if needed to keep it from drying out.
Meanwhile, cook the vermicelli in boiling salted water until just tender, then drain and set aside.
Combine the corn flour with 1/2 cup water then add this mixture to the simmering beef sauce, stirring until it thickens.
Fold the drained noodles into the beef sauce and mix well.
Serve topped with the chopped spring onions and add Chinese dark vinegar or chilli oil if you like extra tang or spice.