1. Preheat your oven to 375-400°F and line a baking sheet with parchment paper.
2. Thaw the frozen puff pastry sheets according to package instructions.
3. Roll out the puff pastry slightly on a floured surface and cut into small squares or circles.
4. In a bowl, mix cream cheese, goat cheese, chopped dill, chives, capers, and finely diced red onion.
5. Place a small spoonful of the cheese mixture in the center of each pastry piece.
6. Add a slice of smoked salmon on top of the cheese mixture.
7. Fold the pastry over the filling to create pockets, sealing the edges by pressing with a fork.
8. Brush the tops with an egg wash for a golden, crispy finish.
9. Place the filled pastries onto the prepared baking sheet, spacing them slightly apart.
10. Bake for 15-20 minutes or until puffed and golden brown.
11. Remove from the oven and let them cool slightly before serving.
12. Garnish with fresh herbs, extra capers, and a sprinkle of lemon zest.
13. Serve warm and enjoy with sparkling wine or champagne.
14. If preparing ahead, assemble the pastries and freeze before baking.
15. Experiment with variations by using different herbs, cheeses, or smoked fish.