Peel and wash the potatoes and cook them in lightly salted water for about 20 minutes. In the meantime, wash and clean the tomatoes and zucchini. Cut the mozzarella into strips. Cut the potatoes, zucchini and tomatoes into thin slices.
Butter a baking dish and layer the potato, courgette and tomato slices in a colorful sequence. In between, season lightly with salt, pepper, basil and oregano.
Cook in a preheated oven at 200 ° C for about 20 minutes.
Take out briefly, cover with the mozzarella strips and bake for another 5-6 minutes until the cheese melts easily.