In a medium pot, place the pearl barley and water. Bring to a boil. Reduce to simmer, on low, for 30 minutes. The barley should be tender and all the water absorbed. Allow to cool slightly.
In a large bowl, combine the remaining salad ingredients. Add the cooled barley. Toss with the dressing to coat.
Divide the salad into meal prep containers and refrigerate until ready to eat.