Start by following the instructions on the package to cook the barley. Make sure that the barley is drained and cooled before making salad.
Measure out 3 cups of the cooled barley into a large bowl. Place all of the other salad ingredients on top of the barley. Stir everything to combine.
Make the dressing by combining all of its ingredients in a bowl. Whisk until smooth.
Slowly pour half of the the dressing over the salad and stir to combine. Add the rest of the dressing and stir again.
Refrigerate the salad until ready to serve.
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Notes
Using Pearl Barley vs Pot Barley:
Pearl Barley is simply a more polished and refined barley, and will cook a little faster. (Think white rice vs brown rice.)
Pot Barley still has most of its bran layer intact since it only had its outer husk removed, making it more flavorful, but will take longer to cook.
Since the barley in this recipe is precooked for the salad, any which type of barley can be used, as long as you follow the instructions on the package.