Since ancient times, olive oil has held an almost mythical status; it was considered to be not just an essential culinary adornment, but a contraceptive, detergent, pesticide and perfume. Today, its following remains cult-like, with devotees wed to tasting rituals, such as only tasting it in special glass containers at 28 degrees Celsius, and touting obscure bits of knowledge about the numerous olive oil varietals, from Albatro to Salicino, from which it is pressed. Throw in its additional health benefits, and sales of olive oil have doubled in the past two decades, according to International...