Storage: Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in the oven or microwave before serving.
Substitutions: Use Granny Smith or Braeburn apples for best results as they hold their shape. You can substitute half the butter in the pastry with lard for a flakier crust.
Tips: Ensure the caramel is hot before adding apples to prevent sticking. If the tart sticks to the pan, run a knife around the edge and let it cool for another minute before inverting.
Variations: Add a splash of Calvados or Grand Marnier to the caramel for an adult twist. Serve with vanilla ice cream or whipped cream.