IDAHO FALLS — Local miller Jeremiah Clark plans to soon expand into a new Idaho Falls facility with the capacity to process up to 5 percent of the world’s quinoa supply. Clark, owner of American Mills, LLC, contracts with 17 growers from American Falls through Ashton to raise his own proprietary variety of the nutrient-rich, pseudo-cereal crop. His quinoa fields range in size from 100 to 200 acres, and he’s already made Eastern Idaho the largest quinoa production region in North America. He hopes to have equipment installed by the end of October to commence operations at his new quinoa...