Prepare the quinoa salad: combine quinoa, tomatoes, cucumber, onion, feta, and parsley in a bowl. Drizzle with olive oil and lemon juice, season with salt and pepper, and toss to coat.
Arrange the board: place small bowls of hummus and tzatziki on a large serving board.
Add the quinoa salad and arrange olives, roasted peppers, pita wedges, and grilled halloumi or falafel around it.
Garnish with herbs and lemon wedges for a bright, fresh finish.
Serve immediately — perfect for sharing or a light summer meal.