Boil the noodles as per instructions given on the packet. Rinse with cold water, apply some oil to avoid sticking and keep aside.
In a bowl mix all the sauces, vinegar, pepper, and salt. Keep aside

Heat oil in a large wok or pan. Add garlic, saute for a few seconds till they become fragrant.
Add the sliced onion and stir fry till it becomes translucent and then add all the remaining vegetables and white portion of spring onion. Stir fry for around 2-3 minutes or till vegetables are cooked but crunchy.

Add the sauce mixture, mix and stir fry for a few seconds before adding the noodles. Stir fry for another 2 minutes, tossing continuously till everything gets mixed nicely.
Garnish with the green part of spring onions and serve hot.