In one of the driest deserts in the world, late into the night, there is a garden of prickly pear bathed in moonlight. As the precious cacti are resting in the desert chill of the night it prepares itself for the first blush of sunrise, soon transforming into a feverish mid-day heat wave. From ancient times this remarkable and unassuming plant has quietly become one of the most important sources of food and an ingredient in skincare for the native cultures where it is found, in particular Morocco. On a chance encounter on a departing flight from Casablanca, international makeup…