For the puree: Peel, wash and roughly dice the whole potatoes and cook in salted water for about 20 minutes.
For the meatballs: Soak the rolls in cold water. Peel and chop 1 onion. Wash and chop the parsley. Squeeze the rolls well. Knead with minced meat, diced onion, egg, mustard, parsley and 1 tsp. salt and pepper each. Form 8 meatballs from the minced meat mixture. Wrap 1 slice of bacon around each meatball. Heat 2 tablespoons of oil in a frying pan. Fry the meatballs for 6-8 minutes on each side.
For the fried onions: Peel 2 onions, cut them into rings and turn them in flour. Heat 7-8 tablespoons of oil in a small pot and fry the onion rings in it for about 5 minutes until golden brown. Take them out, let them drip off on kitchen paper and season with salt.
For the puree: Drain the potatoes, add 2 tablespoons of olive oil and mash everything finely. Season the puree with salt and nutmeg. Arrange the meatballs with the puree and roasted onions. Drizzle roasting mixture over the meatballs.