Heat 150 ml of milk. Dissolve yeast in it. Then knead with flour, soft fat in pieces and 1/2 teaspoon salt. Cover and leave to rise in a warm place for 30 minutes. Clean and wash the sprouts.
Cook in salt water for about 5 minutes. Drain. Whisk eggs and remaining milk, season with salt, pepper and nutmeg. Knead the dough again and roll out larger than a springform pan (24 cm Ø).
Line the bottom and rim of the mould with dough. Cut off protruding edges and work into a cord. Fill Brussels sprouts into the mould. Pour egg milk over it. Spread slices of bacon on top. Put the dough cord around the rim.
Bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 45 minutes until golden brown.