Stream The Mother Grain Online Free – Watch Full Movie from Home at 123Movies. . As the international consumption of quinoa rises. The Mother Grain looks at how this increasing demand is affecting quinoa farmers. Bear Witness Pictures traveled to the Bolivian quinoa-growing communities surrounding the world's largest salt flat, the Salar de Uyuni, witnessing their lives first-hand to tell the story of quinoa from the perspective of the farmers themselves.