Place the sliced chicken into a mixing bowl. Mix 1.5 tsp of oil with the light soy and 1.5 tsp cornflour, stir to combine and pour it over the chicken. Stir to coat all the chicken slices.
Heat your wok over a high heat until it starts to smoke then add the 1.5 tbsp of oil. Add the chicken and stir-fry for 2 minutes until white all over. Remove with a slotted spoon and set aside on a plate.
Reduce the heat to medium and add the onions, peppers and carrots to the wok and stir-fry for 1.5 minutes, then pour in the chicken stock along with the curry powder, turmeric, sugar, and salt.
In a small bowl combine the 1 tbsp of cornflour with 1.5 tbsp of cold water and stir until the cornflour is dissolved. Stir the cornflour slurry into the curry mixture and simmer for 2 minutes, until thickened.
Add the chicken and resting juices plus the peas into the wok and simmer for 3 minutes, stirring frequently. Check the seasoning and add more, to taste, if required.
Serve with your choice of rice, noodles or chips and garnish with the spring onions.