Arugula

Arugula or arrugula (Eruca sativa) is a sharp-flavored green that grows as a weed around the Mediterranean Sea and has a long history in British and American herbal and garden literature. Since 1990 it has become widely popular as a salad ingredient, garnish, and even pizza topping in the United States. So rapidly did arugula replace and surpass watercress and dry-land cresses and mustards in common use that writer David Kamp titled his 2006 book on the rise of California/Mediterranean food and the shift in farm-restaurant-gourmet ideology The United States of Arugula: How We Became a Gourmet Nation.