Roll out the puff pastry and divide into 12 cake pieces. Divide into 6 pieces each, and spread the sausage and liver sausage on the wide ones. Fold the dough over it, roll it up and bend into croissants. Place on a baking tray lined with baking paper.
Whisk the egg yolk and cream. Spread the croissants with it. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 20 minutes until golden brown. Best served lukewarm.