Preheat oven to 400 F (200 C).

Unfold the pastry dough on a lightly floured surface.

Fold the pastry into an oblong shape, twice, to create layers.

Roll the folded pastry firmly until it is thin again.

In a bowl, combine the Chinese jujube halves and grated cheddar cheese.

Spoon the jujube and cheese mixture into the center of the pastry.

Brush the edges of the pastry with half of the beaten egg.

Roll the pastry carefully to enclose the filling and crimp the edges to seal.

Cut 1-inch slices into the top of the pastry to allow steam to escape.

Bake in the preheated oven for 40 minutes, or until golden brown.

Remove from the oven and let cool slightly before slicing.

Serve the strudel hot or cold with a green salad and soft buttered rolls.