Wash the potatoes and carrots and dice them roughly. Cover both and cook in a little salted water for about 20 minutes
Cut half the onion into rings, the rest into fine cubes. Knead tartar, curd, diced onion and mustard. Season with salt and pepper. Form 2 meatballs from the minced meat mixture
Heat the oil in a coated pan. Fry the meatballs in it for about 5 minutes on each side. Fry the onion rings for approx. 5 minutes while turning them
Drain the potatoes and carrots. Add milk and crush everything coarsely. Season to taste. Wash parsley and chop finely. Arrange everything, sprinkle with parsley