Preheat oven to 425° F and adjust the oven rack to the middle of the oven.
Roll out 1 single crust pie dough for a 9" pie and press into 9” pie pan. Prick gently all over with fork.
Cover center of pie crust with aluminum foil and fill with pie weights (or dried beans). Brush edges of pie crust with heavy cream.
Bake 7 minutes. After 7 minutes, remove the pie weights and foil. Return pie crust to oven and bake an additional 5 minutes, uncovered.
Soak 1 Tablespoon unflavored gelatin in 1/4 cup cold water in a small mixing bowl.
In a medium sized saucepan over medium heat, combine 3 large egg yolks, 1/2 cup granulated sugar, 1/4 teaspoon salt, 2 teaspoons lemon zest and 1/4 cup + 2 Tablespoons freshly squeezed lemon juice. Cook until it begins to thicken, stirring constantly.
Once it begins to thicken, pour through a fine mesh strainer to remove any lumps that formed while cooking. Then, add to gelatin mixture and stir until dissolved. Chill.
Once lemon mixture begins to slightly set, beat 1 1/2 cups of the 2 cups heavy whipping cream until peaks form and fold into lemon mixture. Fill baked pie shell.
Mix remaining whipping cream ( 1/2 cup) with the 2 Tablespoons confectioner's sugar until peaks form, spread on top of lemon filling. Chill at least 4 hours before serving.