Cook the noodles with salt according to the instructions in the package. Drain and rinse in cold water. Set aside till use.
Bring the vegetable stock to a boil in a large saucepan over medium heat. Add ginger, garlic, cabbage, carrot and stir for 1-2 minutes.
Then add add chilli sauce, soy sauce, vinegar, salt to the soup and cook for 2 to 3 minutes.
Drop the wontons one by one into the soup, and let them cook for 3 to 5 minutes, until they float to the surface.
Reduce heat to a simmer, add sesame oil and cooked noodles to the soup. Meanwhile, mix corn flour in 3 tbsp water. Add to the soup and bring this to boil.
Boil till the soup starts to thicken. Remove from heat, season with salt and pepper and garnish with spring onion.