Pre-heat the oven to 200℃ (400℉).
Prepare a 12-hole muffin tin by lightly greasing with oil or butter (don't use too much as there is a lot of fat in the pastry).
Roll out your puff pastry, keeping the sheet of baking paper it is rolled in underneath.
Spread the cream cheese in an even layer over the top of the pastry.
Sprinkle your cheese(s) over the top.
Sprinkle some chopped chives (if using).
Carefully, start to gently roll the pastry from the shorter side (which is facing you). Move quickly, as the pastry will start to soften once it is out of the fridge.
As you roll, tuck the ends in a little, and try to keep the roll fairly tight.
When ready, cut the pastry into 12 fairly even slices.
Carefully pick the slices and place them in the muffin tin (see note 2).
Bake for around 25 minutes, until the tops are nice and golden.
Leave them in the tin to cool for a while, then turn them out.
The pastries are delicious slightly warm or eaten cold. They also freeze really well. Enjoy on a picnic, for a quick snack, or light lunch.