Soak the buns. Peel onions. Chop 1, cut 5 into rings. Peel and wash the potatoes. Cook in salted water for about 20 minutes
Heat 2 tablespoons of fat. Fry the onion rings in portions until golden brown, turning them over. Dust with flour and sauté until light brown. While stirring, deglaze with 3/8 l water and 1/8 l milk and add the cream. Bring to the boil and simmer for about 5 minutes. Season onion sauce with salt and pepper
Knead minced meat, squeezed out roll, diced onion, mustard and egg. Season with salt, pepper and paprika. Form approx. 12 small meatballs from it. Fry in hot oil for 6-7 minutes per side
Heat up 1/4 l milk and 1 tablespoon fat. Drain and steam the potatoes. Add milk and mash potatoes. Season to taste with salt, pepper and nutmeg
Wash and chop the parsley. Dice gherkins finely if necessary. Arrange everything and sprinkle with parsley and gherkins. Serve with a green salad