Preheat your oven to 200°C (390°F). Line a baking sheet with parchment paper.
Roll out the puff pastry on a lightly floured surface. Cut the pastry into small squares or rectangles, depending on your desired size for the appetizers.
Assemble the Appetizers:
Place the puff pastry squares on the prepared baking sheet, spacing them slightly apart.
Spread a small amount of ketchup on each puff pastry square.
Layer with slices of boiled sausage, smoked sausage, tomato, and pickled cucumber on top of the ketchup.
Drizzle a little mayonnaise over the toppings.
Sprinkle grated cheese generously over each assembled appetizer.
Bake:
Brush the edges of the puff pastry with the beaten egg to give them a golden, shiny finish.
Bake in the preheated oven for 15-20 minutes, or until the puff pastry is golden brown and the cheese is melted and bubbly.
Serve:
Allow the appetizers to cool slightly before serving.
Serve warm and enjoy these delicious puff pastry snacks!