Delicious recipe: puff pastry with salmon and potato salad

Puff pastry:

Preheat the oven to 200°C.
Unroll the puff pastry and top it with smoked salmon, melted cheese, parsley, and spring onion. Roll the pastry up and seal the edges.
Brush the surface of the pastry with beaten egg.
Bake for 20-25 minutes, until golden and crispy.
Potato Salad: