Peel onion and chop very finely. Squeeze out the sauerkraut and tear apart. Peel, wash and roughly grate the potatoes. Mix potatoes, sauerkraut, onions, flour and eggs. Season with salt, pepper and nutmeg. Heat 1 tablespoon of oil in a frying pan, add three heaps of potato and sauerkraut dough to the pan with one tablespoon of oil and press flat.
Fry over medium heat for 2-3 minutes on each side and keep warm. Prepare 9 more buffers in the same way. In the meantime crush juniper berries. Mix crème fraîche, quark and juniper berries and season with salt and pepper. Arrange three buffers, a dash of juniper crème fraiche and two slices of ham on each plate. Serve garnished with parsley as desired