Prepare the Barley: Cook the pearl barley in a saucepan with twice its volume of water, following the package instructions. Bring to a boil, then reduce the heat and simmer gently for 20 minutes until the barley is tender yet still al dente. Drain and set aside to cool.
Roast the Vegetables: Preheat oven to 400°F / 200°C (180°C fan-assisted) and line a baking sheet with parchment paper. In a large bowl, toss sweet potatoes and red onion with olive oil and harissa spice until evenly coated. Evenly spread the vegetables on a baking sheet and roast for 25-30 minutes, stirring halfway through, until they are tender and have caramelised edges. Allow to cool slightly.
Mix the Dressing: In a small bowl, whisk together lemon juice, apple cider vinegar, and olive oil. Season with salt and pepper to taste.
Assemble the Salad: In a large salad bowl, combine the cooked pearl barley, roasted vegetables, halved tomatoes, crumbled feta, and chopped mint. Drizzle the prepared dressing over the salad and toss gently to mix.
Serving Suggestions: Serve the salad at room temperature or chilled, as preferred. Offer extra lemon wedges on the side for guests to adjust the tanginess to their liking.
Enjoy!
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