Layer the potatoes in a baking dish. Mix the milk and cream, season (little tip: I squeezed and added 1 clove of garlic) and pour over the potatoes. Sprinkle with the cheese and bake in the preheated oven at 175 ° for about 30 minutes.
Debark the bread and finely crumble it. Mix with the herbs and pistachio. Stir in 2 tablespoons of olive oil and season with salt.
Season the lamb and fry it on both sides in a little clarified butter for about 2 minutes. (If you don`t like the meat very rosé, you should leave it in the pan a little longer) Add the crumb mixture and press down a little. Put in a baking dish and cook at 175 ° for approx. 5 minutes. Warm places.
Add the wine and stock to the frying fat and reduce a little. Add the cream, season with salt, pepper and the vinegar and thicken with the sauce thickener.
Arrange and maybe serve with a nice crunchy green salad.