Quinoa salad with tuna and preserved lemon

Quinoa is a South American grain that is high in protein and very nourishing, as it contains all eight essential amino acids. Although quinoa comes in many varieties, the most common are white, red and black, or a mixture of the three. My preference is the mix, but you can use whatever is available. If you haven’t yet fallen under the quinoa spell, then use steamed rice, couscous or risoni pasta instead.