Heat lot of water in a big pan till it starts to a boil.
Add the whole wheat noodles in this boiling pot of water along with some salt (keep it low)
Cook the noodles according to instructions given on pack, mine usually take 6-7 minutes on medium heat. Cook the noodles till al dante.
Drain the water out of noodles, rice them in cold water and spread them on to a plate.
Now take a wok or karahi add 2 tablespoon of oil and add sliced ginger and spring onion, cook them for about a minute.
Now add rest of the vegetables and stir fry on high heat for 3-4 minutes so that veggies are slightly brown on the sides.
Now add soy sauce and green chilli paste, also add vinegar to the wok and toss every thing well.
Taste and season it with required salt to your taste and black pepper to your taste. Add cooked noodles to the wok and toss them well.
Garnish the hakka noodles with fresh coriander and spring onion greens and serve hot.