Cut the top off the apples and remove the core, leaving a lot of space inside.
Chop the apple flesh into small pieces and fry them in a pan with butter, then add brown sugar, cinnamon, salt, walnuts, and lemon juice - fry for 1-2 more minutes.
Wrap the apples with the puff pastry, as shown in the video, and add the filling inside. Bake for 20-25 minutes at 160 degrees (320 F).
Then top with a scoop of ice cream.
