Spread the blueberry jam over one side of the puff pastry
Add the cheese over one end of the pastry and fold over
Cut into long triangular shapes to form around 8 croissants, make a small cut in the longer end and roll (see video for technique)
Put the croissants on a baking tray, add the egg wash and top with some chopped pistachios
Bake at 200c for around 15 minutes, if using fresh mozzarella the cooking will take longer as the cheese has more liquid in. Enjoy them!
