01 -
Preheat the oven to 350F (180C) and cut out 6 small circles out of parchment paper to line the bottom of 6 wells of your muffin tin.
02 -
Fill a pot with water and bring it to a boil. Meanwhile, slice the apples into 1-mm thick half moon slices (do not peel them). Turn off the heat and add the apples to the hot water. Allow to soak until soft and bendable (about a minute), then drain.
03 -
If using frozen puff pastry, use a rolling pin to roll it out into a 2-mm thick rectangle. If using thin refrigerated puff pastry, skip rolling. Cut the puff pastry into 6 strips. Place apple slices on the top half of each strip, then fold the pastry in half covering the lower part of the apples while leaving the rounded edges exposed at the top. Gently roll up the strip to form a rose, pinching the end of the dough to seal. Repeat with remaining pastry and apples.
04 -
Add the sugar and water to a small pot, stir until combined then place over medium heat. Allow the sugar to melt and caramelize, stirring occasionally. Avoid mixing crystallized sugar from the sides of the pot into the mixture. The caramel is ready when it reaches an amber color, which may take 10-15 minutes. Do not let it turn dark brown or it will burn in the oven. Work quickly once ready as it will harden rapidly.
05 -
Pour about 1 tbsp of caramel into each muffin tin well, then place the apple tarts upside down into each well.
06 -
Bake until the puff pastry is golden and flaky, about 20-25 minutes. Remove from the oven and immediately unmold the tarts from the tin. Allow to cool for just a few minutes before serving.