Preheat your oven to 350°F (175°C).
In a bowl, combine flour and powdered sugar.
Add the cubed butter and mix until crumbly.
Stir in the egg yolk until the dough comes together.
Press the dough into a tart pan evenly.
Bake the crust for 15 minutes until golden.
In another bowl, whisk together eggs, granulated sugar, lemon juice, and zest.
Mix in the heavy cream until smooth.
Pour the lemon mixture into the baked crust.
Bake for an additional 15 minutes until set.