Preheat oven to 200ºC (390ºF). Wrap tomatoes in prosciutto and place on a baking tray lined with non-stick baking paper. Sprinkle with salt and pepper and drizzle with oil. Roast for 10–15 minutes or until the prosciutto is crisp. Serve with the mozzarella and basil and drizzle with the vinegar and extra oil. Serves 4.