Have your oven preheated to temperatures of about 375°.
Mix up the sugar, flour, and the necessary spices inside a bowl and let it rest.
On a different container, mix the apple slices with lemon sugar. Put in the sugar mixture and flip the mixture for an even coating.
Properly dust your surface with flour before evenly rolling your dough into an 8-inch circle. Move the dough into a 9-inch pie pan and cut off any extra dough to have a uniform bake.
After adding the filling, put on some butter. Evenly roll out the remaining dough to make a uniform spread of about 8 inches.
Put the rolled flour on top of the filling. Evenly snip out any extra dough on the edges.
Vigorously whisk the egg white until foamy, then use a brush to spread it on top of the crust.
Dust it using some sugar before loosely wrapping it with a foil.
Let it bake for around 25 minutes before removing the foil. Allow it to bake to a golden brown cook on the crust.
Finally, place the bake on a wired rack and allow it to cool.