Preheat oven to 400° F. Line two, rimmed baking sheets with parchment paper. I prefer to make my tarts one sheet at a time to keep the second sheet of puff pastry from getting warm.
Unroll the first puff pastry sheet on a lightly floured surface. Roll out slightly with a rolling pin to get rid of the deep creases. Cut each sheet into six rectangles.
Drizzle one tablespoon of honey onto the parchment paper in six equally spaced spots. Spread to create a thin layer.
Arrange four to five apple slices in a thin layer on top of the honey. Top with a thin slice of brie. You can trim the edges off the brie or leave it on. Trim the ends if needed to make them fit.
Place the puff pastry rectangle on top of the apples, brie and honey. Gently press down on the edges to seal. Brush the egg wash (egg mixed with one tablespoon of water) evenly over each puff pastry rectangle.
Bake in preheated oven for 15 to 20 minutes, until the puff pastry is puffed up and golden brown. Repeat the process with the second baking sheet while the first sheet is baking.
Remove from the oven with oven mitts and place on a cooling rack to cool for a few minutes. Carefully flip the tarts over on the baking sheet or onto a serving plate.
Serve sprinkled with chopped, fresh rosemary. Take this with simple tart up a notch with a scoop of vanilla ice cream or sprinkle with icing sugar.
Notes
Can I make these tarts ahead of time? While it’s best to enjoy the tart fresh out of the oven, you can make it a few hours in advance. Simply let it cool to room temperature, and when you’re ready to serve, warm briefly in the oven or serve at room temperature.How do I store apple tarts? Allow tarts to cool completely, then place in an airtight container. Store in the refrigerator, they contain cheese, for no more than 3 days. The puff pastry starts to get soggy and a bit chewy the longer they are stored.Can I freeze upside down puff pastries? While it’s possible to freeze the tart, the texture of the puff pastry may be affected upon thawing and reheating. Cover tightly with plastic wrap and freeze for up to one month. To thaw, place in the refrigerator for 24 hours.Can I add other ingredients or spices to this recipe? Absolutely! You can add a sprinkle of chopped nuts, such as walnuts, pistachios, or pecans, to the caramelized apples for extra crunch. A sprinkle of cinnamon, ginger, or cloves can be added for a hint of warmth.