Warm the milk lukewarm. Put 375 g flour in a bowl and press a depression in the middle. Crumble yeast into it. Add 2 tbsp. sugar and lukewarm milk. Mix with some flour from the edge to the pre-dough.
Cover and leave to rise in a warm place for 15-20 minutes.
Spread butter in flakes, 50 g sugar, 1 pinch of salt and 3 egg yolks on the edge of the flour. Mix everything with the dough hooks of the mixer to a soft yeast dough and let it rise covered for about 40 minutes.
Line a baking tray with baking paper. Briefly knead the yeast dough and roll out into a rectangle (approx. 25 x 40 cm) on a little flour. Divide into 6 cake pieces. Roll up the cake pieces loosely from the short side towards the top.
Place on the tray, cover and leave to rise for about 30 minutes.
Wash and drain the red endive leaves. Mix the ceviche and spread it in the endive leaves, sprinkle with fleur de sel and serve very fresh.
Cover with cheese and ham.