The flavor and texture of barley are similar to that of pasta, so we combined it with the typical pasta salad ingredients.
Bring 2 cups water to a boil in a large saucepan. Add barley; cover, reduce heat, and simmer 45 minutes. Drain and rinse with cold water; drain.
Combine the juice, oil, and salt in large bowl; stir well with a whisk. Add barley, tomato, and remaining ingredients; toss gently to coat.
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