Heat a griddle pan on a high heat until smoking. Brush the pita breads with olive oil and grill until both sides are charred and toasty. Cut each pita into 8 triangles and set aside. Toss the asparagus in olive oil, season to taste and grill on both sides. Place the vine tomatoes in an oven proof dish, drizzle with olive oil, season to taste and place in a 180 degree oven for about 10 minutes or until they burst open. Place the lettuce on a salad platter and top with the radish quarters, cucumber spaghetti, grilled asparagus and the roasted vine tomatoes. Place the pita triangles on top of the salad and add the pulled leftover lamb shoulder meat on top. Mix the pesto with some olive oil and drizzle over the salad.