Wash the potatoes thoroughly and boil them with their skins in boiling water for 15-18 minutes. In the meantime heat oil in a pan. Fry the minced meat in it until crumbly, season with salt and pepper. Stir in barbecue sauce, remove pan from heat.
Finely grate the cheese.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Line a baking tray with baking paper. Drain the potatoes, place them on the baking tray and press them a little flatter. Spread the minced meat on the potatoes, sprinkle with cheese.
Bake in a hot oven for about 10 minutes.
Season crème fraîche with salt and pepper. Take the potatoes out of the oven and arrange them. Serve with crème fraiche.