Peel and chop the onions and garlic. Fry them in a large pan in hot oil. Fry the minced meat until crumbly. Sweat tomato paste with. Add tomatoes with juice, chop. Season with salt and pepper. Bring to the boil, cover and simmer for about 20 minutes. Let cool off
Cook the pasta until al dente. Grate cheese. Melt 2 tablespoons of butter. Drain noodles, mix with butter and half of the cheese
Sweat flour in 60 g hot butter. Stir in milk, bring to the boil and simmer for about 5 minutes. Season to taste with salt, pepper and nutmeg. Whisk 3 eggs and 5 tablespoons of water and stir into it (do not boil any more!)
Wash and chop the parsley. Mix 1 egg and 2 tablespoons of cheese. Stir everything into the mince
Grease a large casserole dish and sprinkle with breadcrumbs. Layer half noodles, minced meat, half pasta and sauce one after the other. Sprinkle the rest of the cheese on top. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 40 minutes