01 - Rinse the pearl barley under cold running water. Combine barley, water, and salt in a medium saucepan. Bring to a boil, reduce heat, cover, and simmer for 25 to 30 minutes until the grains are tender. Drain any excess water and let barley cool slightly.
02 - While barley cooks, peel and segment the orange and grapefruit, reserving any collected juices for use in the dressing.
03 - Whisk together extra virgin olive oil, lemon juice, orange juice, honey (or agave), Dijon mustard, lemon zest, salt, and freshly ground black pepper in a small bowl until emulsified.
04 - In a large mixing bowl, gently toss the cooked barley, citrus segments, cherry tomatoes, red onion, chopped parsley, and chopped mint. Drizzle with the vinaigrette and combine lightly.
05 - Divide the barley mixture evenly among four bowls. Arrange avocado slices on top of each serving.
06 - Garnish with additional chopped herbs or lemon zest if desired. Serve immediately for optimal freshness.