01 - Preheat the oven to 400°F. Line two baking sheets with parchment paper.
02 - Place puff pastry sheets on the prepared baking sheets. Prick all over with a fork to prevent excessive puffing. Cover each with another sheet of parchment and a second baking sheet to weigh them down during baking.
03 - Bake for 15 to 18 minutes until golden and crisp. Remove the top baking sheet and parchment layer, then allow the pastry to cool completely.
04 - While the pastry cools, combine ricotta, powdered sugar, lemon zest, lemon juice, and vanilla in a medium bowl. Whisk until smooth and creamy.
05 - In a separate bowl, whip the heavy cream until soft peaks form. Gently fold the whipped cream into the lemon ricotta mixture until fully incorporated. Chill until ready to assemble.
06 - Once the pastry is completely cool, carefully trim the edges and cut each sheet into 3 equal rectangles, yielding 6 total pieces.
07 - Place one pastry rectangle on a serving plate. Spread evenly with one-third of the ricotta filling. Repeat with a second pastry layer and another third of the filling. Finish with a final pastry layer on top.
08 - Lightly dust the top with powdered sugar and garnish with lemon zest curls if desired. Chill for at least 30 minutes for cleaner slicing. Serve cold.