Parisian-Puff Apple Tartlets

1. Center a rack in the oven and preheat to 400 degrees (F).
2. Cover a baking sheet with parchment paper.
3. Cut puff pastry into four 4-inch circles and place onto parchment.
4. Peel apples, cut them into halves and core them.
5. Cut each apple half into six or eight chunks and center on puff pastry.
6. Top each apple with one tablespoon brown sugar, a sprinkling of spices, and 1 teaspoon of cold butter.
7. Curl the pastry up around the apple as much as you can (see photo) and then brush pastry with beaten egg.
8. Bake for about 25 minutes (time will vary depending on your apple variety and how large the apple pieces are) until the pastry is deeply browned and puffed around the apple, and the apple can be easily pierced with a knife.