01 - Rinse the pearl barley under cold running water to remove any impurities.
02 - Bring the vegetable broth to a boil in a medium saucepan. Add the rinsed barley, reduce heat to low, cover, and simmer for 25 to 30 minutes until barley is tender and most liquid is absorbed.
03 - While barley cooks, heat 1 tablespoon of olive oil in a skillet over medium heat. Sauté the finely chopped red onion and celery for 4 to 5 minutes until softened.
04 - Fluff the cooked barley with a fork and transfer to a large mixing bowl. Add the sautéed onion and celery, dried cranberries, and chopped parsley. Stir gently to combine.
05 - In a small bowl, whisk together the remaining 1 tablespoon olive oil, lemon juice, salt, and black pepper. Drizzle over the barley mixture and toss to coat evenly.
06 - Taste and adjust seasoning if necessary. Serve warm or at room temperature as a side dish or light vegetarian main.