Wash the potatoes and cook in salted water for 15-20 minutes. Wash and slice the carrot and kohlrabi. Steam in 100 ml lightly salted water for about 8 minutes. Drain vegetables, collect cooking water. Drain potatoes and cut into slices
Peel and finely chop the onion. Steam in hot fat until translucent. Dust with flour. Stir in vegetable water and milk, bring to the boil. Melt half the cheese in it. Season sauce with salt, pepper and nutmeg
Cut the cured pork into small cubes. Fill into a small greased casserole dish with vegetables and potatoes. Pour cheese sauce over it. Sprinkle with remaining cheese. Bake in a preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 20 minutes until golden brown. Sprinkle with parsley