Cut tomatoes into slices. Season lightly with salt and season with pepper.
Grate the unpeeled zucchini on the ‘Röstiraffel’ and season as well.
Spread half of the zucchetti evenly in a buttered baking dish. Layer the tomato slices on top like a brick, between each slice a little bit of grated zucchetti form.
Mix cream, egg and cheese. Season with salt, pepper and nutmeg.
Spread evenly over the gratin, making sure that a little glaze flows into the spaces, perhaps helping with a fork.
Meanwhile, bake the gratin in the oven heated to 200 °C for about thirty minutes,
Tip: Zucchini are a type of pumpkin and therefore low in calories, rich in vitamins and easy to digest – just the thing for a light meal!