Add the quinoa, brown rice and farro to a mesh strainer and rinse well with cool water. Add the grains to a medium sized pot along with the kosher salt and water. Bring to a gentle boil over a medium-high setting and then turn down to a simmer and cover. Allow to cook for approximately 20-25 minutes until all of the water is absorbed and the grains are fully cooked. Allow to rest briefly before serving.