01 -
Allow the frozen puff pastry sheet to rest at room temperature while preparing the filling and preheating the oven to 200°C.
02 -
Peel the Granny Smith apples and slice them evenly to a thickness between 3 to 6 millimeters.
03 -
Combine melted butter, brown sugar, cinnamon, nutmeg, and salt in a bowl. Toss the sliced apples gently in the mixture until fully coated.
04 -
Roll out the thawed puff pastry into a 25x30 centimeter rectangle. Score a 4 centimeter border along the edges to create a frame.
05 -
Evenly layer the coated apple slices inside the scored border, overlapping slightly to enhance presentation.
06 -
Whisk the egg and brush the edges of the pastry to create a golden finish upon baking.
07 -
Bake in the preheated oven at 200°C for 18 minutes or until the pastry turns golden brown and crisp.
08 -
Allow to cool for 5 minutes. Warm the caramel sauce if necessary and drizzle evenly over the tart.
09 -
Slice into six portions and serve immediately. Optionally accompany with vanilla ice cream.