By Michelle Lee Photography / Getty Images On October 16, the world will mark World Food Day, an annual event that commemorates the creation of the United Nations Food and Agriculture Organization (FAO). Since the aim is to raise awareness about hunger and poverty in the world, we are revisiting the essential role that one kind of food has always played in our lives: grains. And in this era of global warming, lesser-known varieties, such as teff, are moving into the spotlight. On October 16, the world will mark World Food Day, an annual event that commemorates the creation of the United Nation…