Place the quinoa into a sieve and rinse well under cold running water. Place into a pan with the water, bring to the boil then turn down to a simmer. Cover and leave to cook for 7 minutes. Turn off the heat and leave for at least 5 minutes or until you need it.
As the quinoa cooks: Using the coarse side of a box grater, grate the cauliflower chunks into a rice like texture. Alternatively if you have a food processor you can place the cauliflower chunks into it and pulse until mealy. Set aside.
In a large bowl combine the cranberries, chopped coriander and mint, lemon juice and salt.
In a large frying pan, heat the olive oil. Add the mealy cauliflower to the frying pan and stir over a high heat until softened and it looks slightly browned. You don't want to crowd the pan so if there's too much cauliflower for the pan then you may need to cook it in two batches. Pour the cauliflower into the large bowl along with the cooked quinoa. Stir together well and cover with a tea towel and large plate to keep it warm for serving for about 10 minutes.