Chicken Chow Mein

Name: Chicken Chow Mein
Ingredients: 250g / 9oz boneless skinless Chicken Thighs ((see notes)); 2 tsp Light Soy Sauce; 2 tsp Cornflour/Cornstarch; 1 tsp Sesame Oil; 1/4 tsp White Pepper; 2 tbsp Dark Soy Sauce; 2 tbsp Oyster Sauce; 1 1/2 tbsp Light Soy Sauce; 2 tsp Sugar; 2 tsp Sesame Oil; 1 tsp Cornflour/Cornstarch; 60ml / 1/4 cup Chicken Stock; 200g / 7oz dried Egg Noodles ((see notes)); 2 tbsp Groundnut Oil ((or other cooking oil)); 1/2 medium White Onion, (thinly sliced); 100g / 3.5oz Carrot, (julienned/sliced into thin matchsticks); 150g / 5oz thinly shredded Cabbage ((see notes)); 150g / 5oz Beansprouts; 3 Spring Onions ((sliced into 2cm/3/4 pieces))