Defrost the dough. Dice bread rolls, sprinkle with 5 tablespoons of milk. Peel onion and garlic, dice finely. Fry both in hot butter. Let cool off
Wash the meat, dice very finely. Knead with onion, garlic, egg, bread roll, salt, pepper and nutmeg
Place 4 slices of dough on top of each other and roll out rectangularly (approx. 20 x 36 cm). Line a cold rinsed box form (26 cm long) with it. Sprinkle with breadcrumbs. Pour the meat mixture on top, press down a little. Place 2 slices of dough on top of each other, roll out rectangularly (approx. 12 x 26 cm) and lay on the meat. Press the edges together. Cut out 3 small circles from the lid
Roll out the remaining disc of dough a little. Cut out half moons and 3 rings. Put rings around the openings, moons on the lid. Whisk the egg yolk and 2 tbsp. milk and brush the dough with it
Bake in a hot oven (electric oven 200 °C/circulating air 175 °C/gas: level 3) for about 1 hour. Cover after approx. 30 minutes if necessary. Tastes hot and cold
Drink: cool beer, e.g. Kronenbourg de 1664