Wash the potatoes thoroughly and boil for about 20 minutes. Meanwhile clean, wash and slice the leek. Then steam in a little salted water for 3-5 minutes, drain. For the curry sauce, heat the fat in a saucepan, sweat the flour in it while stirring and deglaze with broth and cream. Season sauce with curry and salt. Remove the skin from the potatoes.
Cut the potatoes into thick slices. Layer them together with the leek in a flat casserole dish. Pour curry sauce over them. Wash the marjoram, dab dry and remove the leaves. Sprinkle curry potatoes with caraway and marjoram. Bake in a preheated oven (electric: 200 °C/ gas: level 3) for 20-30 minutes