1. Preheat your oven to 375-400°F (190-200°C).
2. Roll out your puff pastry or homemade tart dough and place it into a tart pan.
3. Peel, core, and thinly slice your apples.
4. Arrange the apple slices in a decorative pattern on the tart base.
5. In a small bowl, mix sugar, cinnamon, and optional nutmeg or allspice.
6. Sprinkle the cinnamon-sugar mixture evenly over the apples.
7. Dot small pieces of butter over the apples for extra richness.
8. Optionally, drizzle a splash of vanilla extract or Calvados over the tart.
9. Lightly sprinkle turbinado sugar on top for added crunch and caramelization.
10. Bake the tart for 35-45 minutes until the apples are tender and the crust is golden brown.
11. While the tart is baking, gently heat apricot jam or jelly until smooth.
12. Remove the tart from the oven and brush the warm apricot glaze over the apples.
13. Allow the tart to cool slightly before serving.
14. Serve warm or at room temperature.
15. Optionally, pair with vanilla ice cream or whipped cream.
16. Store leftovers in an airtight container; the tart keeps well for a few days.