Preheat the oven to a temperature that is stated on your puff pastry packaging.
Roll out the pastry (if not using the pre-rolled one). Use a small round cookie cutter to cut as many circles as you can. Place them onto a baking sheet lined with baking parchment (or a silicone mat).
Bake them until puffed and golden brown on top (please read the puff pastry package instructions for cooking time but keep an eye on them as they can be ready quicker than that).
Meanwhile: in a food processor, combine smoked salmon, cream cheese, chives, lemon juice and black pepper. Pulse until you get a smooth-ish mixture. Set aside.
When the puffs are ready, take them out and let them cool down completely. Take each puff and using a knife open them up (like a shell). Fill one part of it with about a teaspoon of the mixture and put the other part back on top. Continue until you have used up all the mixture.
Enjoy!
Notes
If you buy puff pastry on a regular basis, then go ahead and choose the one you like. It does not have to be frozen. It can be ready-rolled, fresh.
Chives - for a stronger taste, throw in more chives.
This filling does not need any salt as the salmon is salty enough and so is the cream cheese.
The cooking time may vary slightly. This will depend on your oven as well as the cooking instructions for your puff pastry. I highly recommend keeping an eye on them especially when making them for the first time to avoid burning them.