Place the 1/3 cup of quinoa in a fine sieve and rinse under cold water. Quinoa has a natural coating called 'saponin', which helps protect it from fungus and pests but can also give a bitter and soapy taste when eaten. Giving the quinoa a good rinse before cooking helps remove this coating.
Bring a small saucepan with 1 cup of water to the boil. Add the quinoa to the saucepan, put the lid on and reduce to a simmer. Allow the quinoa to cook for 15 minutes. Once cooked, place the quinoa in the fridge to cool for roughly 15 minutes.
In a small bowl, add the dressing ingredients and mix well. Put the dressing inthe fridge until required. The dressing itself is quite bitter and tangy, which is needed to balance out the sweetness of the granny smith apple.
In a large bowl, add all the salad ingredients except for the apple and quinoa. Leave grating the apple until the last moment to prevent it from turning brown, and if the quinoa is too warm, it will wilt the vegetables.
Take the quinoa out of the fridge and check the temperature (it should be lukewarm or cool so as not to wilt the vegetables). Fluff the quinoa with a fork and addit to the large bowl with the other salad ingredients.
Grate the green apple, leaving the core and add it to the large bowl of salad.
Quickly pour the dressing onto the salad and mix well. You want to ensure that the dressing coats the salad evenly, as coating the pieces of granny smith apple will prevent it from turning brown.
Serve as a main or side salad, and enjoy!