In a medium bowl make the marinade by whisking ingredients together.
Add the salmon cubes making sure they are well coated. Let marinate while you get on with the other ingredients.
Heat 1 tablespoon vegetable oil in a suitably sized frying pan or wok over a low heat. Add the coated salmon and cook, stirring occasionally until fish is cooked through. About 3 minutes. Then remove from the pan using a slotted spoon and set aside.
Turn up the heat under the wok to medium, add the other tablespoon vegetable oil. Then when hot enough add the spring onions, pepper, carrot, and green beans and cook until tender, about 5 minutes.
Turn off the wok and add the salmon and cooked rice in. Stir gently together with the vegetables.