Lemon Barley Pilaf with Chicken

Ingredients

• 1 tablespoon olive oil
• 1 onion, finely chopped
• 2 carrots, peeled and diced
• 2 celery stalks, diced
• 1 garlic clove, crushed
• 1 1⁄4 cups pearl barley
• 2 1⁄2 cups diluted salt-reduced or homemade chicken stock, hot
• 1 tablespoon chopped fresh thyme or 1 teaspoon dried thyme
• 1 lemon, zest grated and juiced
• 1 cup frozen peas
• 400 grams (14 oz) skinned roasted chicken breast, shredded
• 50 grams (2 oz) arugula