For the lemon curd: Fill a saucepan just over one-quarter full with water and bring to a simmer over medium-low heat. In heatproof bowl that fits over the saucepan, combine the lemon juice and cornstarch and whisk well to combine. Place the bowl on top of the saucepan and add the butter and sugar. Whisk constantly until the sugar is dissolved, and then add the eggs slowly, a bit at a time, continuing to whisk until the mixture thickens. Remove from the heat and stir in the lemon zest. Let cool, and then place in the fridge to chill and firm up.
For the raspberry sauce: Combine the prosecco, sugar and raspberries in a large saucepan and bring to a simmer over medium heat. Stir to mash up the berries a bit. Simmer until the liquid is reduced and syrupy, 5 to 10 minutes. Set aside.
For the puff pastry: Preheat the oven according to package instructions. Unfold the puff pastry on a lightly floured surface. Cut the pastry into 16 squares or cut 16 rounds using a cookie cutter. Place the pastry on a baking sheet and brush each with the egg wash. Bake according to package instructions.
For the whipped cream: Whip the heavy cream with the limoncello, sugar and lemon zest.
To serve, place 2 pastry pieces on a plate and top with lemon curd, raspberry sauce and whipped cream. You will have some leftover lemon curd.
This recipe was created by a contestant during a cooking competition. The Food Network Kitchens have not tested it for home use, therefore, we cannot make any representation as to the results.