Spread the peeled and sliced potatoes on the baking sheet coated with margarine. Salt the potatoes as desired and cover with a few walnut-sized margarine flakes. Preheat the oven to 250 ° C.
Let the potatoes sizzle in the oven for about 30 minutes and then top with the bratwurst, and bake everything again for about 30 minutes at 220 ° C until golden brown.