Bring a large pot of salted water to a boil over high. Add farro, and cook, stirring occasionally, until tender, about 15 minutes. Drain well in a fine wire-mesh strainer, and rinse under cold water. Shake to remove excess water, and transfer farro to a medium bowl. Stir in pecans, dried cherries, scallions, parsley, lemon juice, olive oil, salt, and pepper. Fold in feta cheese. Enjoy at room temperature or chilled.