Wash the potatoes and boil in water for about 20 minutes. Clean and wash the zucchini and peppers and cut them into thin slices or slices. Cut cheese into slices. Chop olives. Peel onions and cut into thin slices.
Drain the potatoes and keep warm. Cover the pans with vegetables, onions, feta cheese and olives. Season with salt and pepper. Drizzle with oil. Wash the rosemary and remove the needles. Sprinkle the pan with the rosemary and bake until the cheese has turned golden brown.
Add the boiled potatoes.