01 -
On a lightly floured work surface, roll out the thawed puff pastry into a thin rectangle. Roll up pastry tightly from the short end, forming a log. Slice the log evenly into 12 pieces.
02 -
Place each pastry segment, cut-side down, into a standard muffin tin cup. Using thumbs, press and stretch the dough evenly across the bottom and up the sides to form a pastry shell.
03 -
In a saucepan, whisk together granulated sugar, all-purpose flour, and a few tablespoons of milk to make a smooth paste. Gradually add the remaining milk while whisking, then add the cinnamon stick and lemon peel.
04 -
Place saucepan over medium heat and whisk constantly until mixture reaches a gentle simmer and thickens slightly. Remove from the heat and allow the custard base to steep for 10 minutes.
05 -
In a separate bowl, whisk egg yolks. Remove the lemon peel and cinnamon stick from the milk mixture. Slowly pour the warm custard base into the egg yolks, whisking continuously.
06 -
Pour the custard mixture through a fine mesh sieve into a clean bowl to ensure smoothness. Allow the filling to cool slightly.
07 -
Set oven to 500°F or the maximum safe temperature for your oven.
08 -
Pour the custard into the prepared pastry shells, filling each about three-quarters full. Bake for 12 to 15 minutes until the custard is puffed, blistered, and lightly charred in spots.
09 -
Let tarts cool in the tins for 5 minutes, then transfer to a wire rack. Dust with powdered sugar and ground cinnamon if desired.