Spread the cooled apple purée over the layer of marzipan, then brush the pastry border with a little of the beaten egg. Fold the second sheet of puff pastry in half lengthways, then carefully ...
Unfold the pastry sheet on a lightly floured surface. Roll the pastry sheet into a 16 x 12-inch rectangle. With the short side facing you, spoon the apple mixture ... until the strudel is golden ...