Directions

1. Heat oven to 350 degrees. In a food processor, process the gingersnaps until fine crumbs form. Add the butter, sugar, and 1/2 teaspoon of the salt and pulse until moistened. Press the mixture firmly into the bottom and up the sides of a 9-inch pie plate, using a straight-sided dry measuring cup to help. Place on a rimmed baking sheet and bake until the edges are dry and set, 16 to 18 minutes. Let cool.
   
2. In a medium bowl, whisk together the eggs, condensed milk, lemon zest and juice, and the remaining 1/2 teaspoon of salt. Pour the mixture into the crust and bake until set in the center, 18 to 20 minutes. Let cool and then refrigerate until firm, at least 2 hours.
   
3. Using an electric mixer, whip the cream and powdered sugar on medium until soft peaks form, 2 to 3 minutes. Spread on the pie and serve immediately.