Bring water to a boil in a large saucepan. Cook the potatoes in salted water until cooked.
Mix the sour cream with creme fraîche and marjoram in a bowl. Squeeze the garlic clove. Dice the sheep`s cheese and add, season with salt and pepper. Add the horseradish cream (if you like, you can add 1.5 tablespoons of Boursin Cousine).
Preheat the oven to 200 ° C top and bottom heat and grease a casserole dish with the oil. Drain the potatoes, cut into cubes and place in a baking dish. Mix with the finished red cabbage or pour it over.
Then spread the sour cream mixture on top (if necessary sprinkle some Gouda over it). Bake in the preheated oven for about 30 minutes.