Clean the spinach, wash thoroughly and drain well. Peel and chop onions and garlic. Wash, clean and slice the mushrooms. Heat oil in a pot. Fry the onions in it until transparent.
Add the mushrooms and ground pork and fry until golden brown all around. Add the spinach and cook for about 3 minutes until it has collapsed. Cook macaroni in boiling salted water for about 12 minutes until al dente, rinse with cold water and drain well.
Melt 40 g of fat. Add flour and sweat in it while stirring. Deglaze with the stock and cream, bring to the boil and simmer for about 5 minutes, stirring from time to time. Grate parmesan finely. Add 75 g cheese to the sauce, season with salt and pepper.
Pour the sauce with the egg yolks, do not let it boil anymore. Mix the mead mix, macaroni and cheese sauce. Pour the mixture into a greased casserole dish (approx. 35 cm long). Sprinkle with the remaining Parmesan and breadcrumbs.
Place the remaining fat in flakes on the casserole and bake in a preheated oven (electric range: 200°C/ gas: level 3) for 15-20 minutes. Garnish the casserole with parsley and serve.