How to Make It
Preheat the oven to 375°. In a medium saucepan of salted boiling water, cook the barley until just tender, about 25 minutes. Drain well and spread out on a plate to cool completely.
Meanwhile, spread the walnuts in a pie plate and toast for about 12 minutes, until golden. Let cool, then coarsely chop.
In a bowl, toss the barley with the corn, walnuts and all of the remaining ingredients. Season with salt and pepper and serve.