Cook the potatoes in salted water for about 15 minutes. Wash and clean the zucchini and cut into thin slices. Wash chicken fillet, dab dry and season with salt and pepper. Heat oil in a pan. Fry meat for about 10 minutes, turning. Wash basil and dab dry. Pluck leaves from a stalk and chop finely.
Mix egg yolk and crème légère and add salt, pepper and a little nutmeg. Drain the potatoes, quench, peel and cut into thin slices. Place the potatoes and courgettes in a fan-shaped form, leaving the middle free. Cut the fillet into slices and place in the middle. Sprinkle gratin with crème légère and sprinkle with cheese. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 20 minutes. Sprinkle the gratin with pink pepper berries and garnish with basil