Cook the noodles as per package instructions and keep aside. Drizzle some oil on the noodles to keep it separate.
Heat oil in a wok or a deep and wide pan. Add chopped onion and garlic. When onion becomes soft, add the rest of the veggies, except spring onion. Add salt. Cover and cook till the veggies are done. Add cooked chicken pieces and mix well.
Combine all the sauces together and add to the veggie chicken mixture. Increase the heat to medium-high and cook for 1-2 mins.
Reduce flame and add noodles. Gently mix until the noodles and veggie chicken mixture is incorporated well. Check for seasoning and add more salt and pepper, if required. Garnish with chopped / julienned spring onion greens.
Notes
I cooked one small - medium skinless boneless chicken breast piece with slat and pepper. You can use beef, prawns or sausage or a combination of everything. For veggie version, skip chicken and follow the rest of the recipe.