Preheat the oven to 200 ° C. Butter a baking dish and place in the preheated oven.
Meanwhile, peel the raw potatoes and cut into fine slices, then distribute the slices in the baking dish. Place a few flakes of butter on top and cook for about 20 minutes at 200 ° C until they are slightly crispy.
Make a paste from the remaining ingredients and season well with salt and pepper. Now pour this mixture over the potatoes and bake for another 20 minutes until a golden brown crust has formed.