Clean the leek, wash it and cut it into rings. Wash marjoram, pluck leaves from the stalks and chop coarsely. Heat 2 tablespoons of oil in a pan. Fry the potato noodles for 5 minutes while turning, remove. Add the remaining 2 tablespoons of oil to the frying fat. Fry the minced meat and leek for about 5 minutes. Season with salt and cayenne pepper.
Deglaze with stock and let it boil down for about 5 minutes at high heat. Add processed cheese and let it melt in it. Fold in potato noodles and marjoram, season again. Pour into an ovenproof dish (approx. 2 litres capacity). Rub the gouda cheese over it. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 20 minutes. Serve sprinkled with fresh marjoram