Peel apples, cut in quarters, and slice off the inner core.
Thinly slice apples into wedges and place them in a large mixing bowl.
Sprinkle over the sugar, cinnamon, cardamom, nutmeg, lemon juice, and vanilla. Mix until apples are coated.
Remove the dough from the refrigerator and place it on a lightly floured surface.
Roll the dough out to a 12-inch (30cm) circle. Roll the pastry over the rolling pin or pick it up gently and transfer it to the lined baking sheet.
Arrange apple slices in the middle of the pastry, leaving a 7-inch (6cm) border all around.
Gently fold the dough up and over the apples, overlapping the dough where needed and pressing down to seal.
Brush the pastry with the beaten egg and sprinkle over the sugar.
Bake for 35-40 minutes or until the apples are tender and the pastry is golden.
Remove from oven and allow to rest on the tray for 10 minutes before serving it warm.
Serve warm with a scoop of vanilla ice cream and enjoy!
Store leftovers in a sealed airtight container or wrapped in cling film or foil and refrigerated for 1-2 days. Refer to the notes below for additional storage and freezing instructions.