1. With the rack in the middle position, preheat the oven to 400°F (200°C).
In a bowl, combine all the ingredients. Season with salt and pepper. Set aside.
Place the naan breads on a baking sheet and drizzle with the seasoned oil mixture. Cover with the ratatouille, sausages, olives and cheese. Bake for about 10 minutes or until the crust is golden brown.