Cook the rice in boiling water for 25 minutes until tender, drain.
Heat ½ tbsp oil in a large frying pan and add the egg, leave until just setting then stir to roughly scramble, remove and set aside.
Add the remaining oil to the pan and fry the spring onions, peas and beans for 3 minutes. Stir in the Walnuts and prawns and cook for 3 minutes until the prawns have turned pink throughout.
Add in the cooked rice and fish sauce and stir until heated through.
Cooks tip
For a speedy tip, try using 2 pouches of cooked brown or white basmati rice.