01 - In a bowl, combine olive oil, lemon zest and juice, garlic, oregano, thyme, salt, and pepper. Add the chicken breasts and toss to coat. Cover and marinate for at least 15 minutes, up to 4 hours for deeper flavor.
02 - Preheat oven to 425°F.
03 - Heat a grill pan or skillet over medium-high heat. Cook the marinated chicken for 5 to 6 minutes per side until golden and cooked through. Let rest for 5 minutes, then slice thinly.
04 - In a small bowl, mix Greek yogurt with chopped dill. Set aside.
05 - Place flatbreads on a baking sheet. Spread each with a layer of dill yogurt. Top evenly with sliced chicken, cherry tomatoes, red onion, olives, and crumbled feta.
06 - Bake flatbreads for 8 to 10 minutes until edges are crisp and toppings are warmed through.
07 - Remove from oven, scatter arugula over the top, drizzle with extra virgin olive oil, and finish with a grind of black pepper.
08 - Slice into pieces and serve immediately while warm.