Wash the potatoes and cook in plenty of boiling water for about 20 minutes. Rinse under cold water, drain and peel. Melt the fat in a saucepan. Stir in flour and sweat briefly.
Add the stock and milk while stirring. Bring to the boil, boil for 3-5 minutes and season with salt and pepper. Peel and wash carrots and fairy tails. Cut the carrots into slices and the little mareübchen into cubes.
Grate the cheese roughly. Wash the parsley, shake dry, pluck the leaves from the stalks and chop them, except for a little to garnish. Cheese,
Dice the potatoes. Put the potatoes, carrots, fairy tubs and sunflower seeds in a greased casserole dish. Pour sauce over them and sprinkle with the rest of the cheese. Cook in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 30 minutes.
Garnish the finished casserole with parsley.