Preheat the oven to 200 degrees Celsius / 390 Fahrenheit top and bottom heat.
Place all the ingredients for the cream cheese filling in a food processor and blend until smooth. Season with salt and pepper to taste.
Pat the salmon dry with a paper towel. Cut the puff pastry roll in half and place the salmon on top. Make sure the salmon protrudes about 1cm from the pastry on all sides.
Sprinkle the salmon with salt and pepper to taste, then spread the herb cream cheese on top. Beat the egg with a dash of milk and brush the edges of the pastry.
Cover with the rest of the pastry. Do you have some pastry left over? Use a cookie cutter to cut out cute designs and spread them over the top as I did.
Brush the top with the rest of the egg wash and sprinkle a few sesame seeds on top to taste. Bake the salmon in the oven for about 25-30 minutes until golden brown. Enjoy!