Wash the potatoes and cook for about 20 minutes. Clean and wash the Brussels sprouts and cook them for about 15 minutes in 1/4 l of lightly salted water.
Potatoes quench, peel and in rough cubes cut. Drain the Brussels sprouts. Collect the vegetable stock
If necessary, wash the cured pork and pat dry. Fry briefly on each side in 1 tablespoon of hot fat. Remove. Heat 1 tbsp. fat in the frying fat. Sauté the flour in it. Deglaze with vegetable stock and milk. Let simmer for 3-5 minutes while stirring. Season to taste with salt, pepper and mustard
Place the potatoes and Brussels sprouts in a greased casserole dish. Insert the casserole slices. Pour the sauce over them. Grate the cheese and sprinkle over it. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C / gas: level 3) for approx. 20 minutes