Preheat oven to 190°C/375°F. Place chicken in a dish and brush with pesto and a little oil. Set aside.
On an oven tray lined with baking paper, place capsicum, tomatoes, olives and bread. Drizzle over half the oil. Season with pepper. Toss to coat evenly. Cook for 25 minutes, turning halfway.
Meanwhile, spray a pan or griddle with oil and set over a medium-high heat. Cook chicken for 5 minutes either side or until lightly golden and cooked through. Slice.
In a small bowl, combine red wine vinegar and remaining oil. On a serving platter, place lettuce leaves and scatter over roasted vegetables and bread. Place sliced chicken on top. Drizzle over dressing and top with basil. Season with freshly ground black pepper and serve.