Spinach, olive and preserved lemon salad

The first references to spinach are from Sasanian Persia (about AD 226–640) and when it reached China it became known as the ‘Persian green’. The first mention of it in the Mediterranean was in the 10th-century medical work of Al-Razi and in two agricultural treatises, one by Ibn Wahshiya, the other by Qustus al-Rumi. With that knowledge under your belt, this salad should be doubly satisfying.