Place puff pastry slices next to each other on the work surface and allow to defrost. Let the peas thaw as well. Drain the pineapple. Cut smoked pork loin into small cubes. Grate cheese. Chop the pineapple into small cubes.
Mix Kasseler, pineapple and peas. Stir in cheese and crème fraîche. Season with pepper. Halve the puff pastry slices to make 2 squares each. Cut flowers out of one half with a cookie cutter. Separate the egg. Whisk egg yolk and cream. Brush the edges of the whole puff pastry squares with egg white. Place one puff pastry half with the flower cut out on each and press the edges together. Spread with whisked egg yolk and sprinkle with sesame seeds. Put some filling into the circle. Spread egg yolk and cream mixture on the cut flowers and sprinkle with sesame seeds.
Brush the edges of the whole puff pastry squares with egg white. Place one puff pastry half with the flower cut out on each and press the edges together. Spread with whisked egg yolk and sprinkle with sesame seeds. Put some filling into the circle. Spread egg yolk and cream mixture on the cut flowers and sprinkle with sesame seeds. Bake all pieces in a preheated oven (electric cooker: 200 °C/ gas: level 3) for about 20 minutes. Remove the cut flowers after 12-15 minutes. Arrange the puff pastry particles on a plate, garnished with parsley as desired