Place barley in a saucepan with 1.5L (6 cups) boiling water. Simmer for 25 minutes or until just tender.

Rinse under cold water, then drain.

To make dressing, place all ingredients in a screw-top jar and shake well.

Place pine nuts, olives, tomatoes and rocket in a large bowl with barley.

Add dressing, toss to combine. Serve in bowls, top with feta and season with salt and freshly ground black pepper.