Cut the rolls into small pieces and soak in hot milk.
Peel and chop the onion and garlic, sauté with 1 tablespoon butter in a small pan or in the microwave.
Add the minced meat, sausage meat, eggs, mustard, parsley, thyme and all the spices to the soaked bread roll and quickly knead everything into a smooth meat dough.
Spread a 15 cm high baking dish with a little softened butter and sprinkle with breadcrumbs. Now fill half of the meat dough into the baking dish and place 4 hard-boiled, peeled eggs in the middle, spread the remaining meat dough on top and cover with flakes of butter.
Bake in the preheated oven at 150 ° C for approx. 1 hour in the closed casserole dish, bake for another 15 minutes without a lid at 180 ° -200 ° C until golden brown, until a nice crust has formed.