Wash the potatoes and cook covered for about 20 minutes. Quench, peel and let cool.
Clean and wash the Brussels sprouts. Cook in boiling salted water for about 15 minutes. Then drain and drain well.
Peel and finely chop the onion. Rinse cured pork loin, dab dry and cut into cubes. Heat 1 tablespoon of fat. Brown the sausage all around. Season with pepper and remove.
Heat 1 tablespoon of fat in the frying fat. Fry the onion until transparent. Sweat flour in it. 1⁄4 l Stir in water, milk and stock. Bring to the boil and.
Simmer for about 5 minutes. Dice cheese. Melt half the cheese in the sauce while stirring. Season to taste with salt and pepper. Chop 5 nuts roughly. Cut potatoes into thick slices. Fill into a greased oven dish with cabbage and cured pork loin.
Pour cheese sauce over it. Spread the rest of the cheese and nuts on top. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/gas: level 3) for about 15 minutes.