12 sheets graham crackers (about 2 cups of crumbs)
¼ teaspoon kosher salt, divided
6 tablespoons unsalted butter, melted
23 key limes (or ⅔ cup key lime juice)
3 large eggs
1 (14-ounce) can condensed milk
Directions
Preheat the oven to 350 F.
In a food processor, blend the graham crackers and ⅛ teaspoon kosher salt to fine crumbs.
Add the melted butter and process lightly to combine.
Press the crumbs into and up the side of a 9-inch pie plate and use a small measuring cup to pack in the crumbs.
Bake on a lower rack for 10-12 minutes or until lightly golden along the edges. Set aside.
If using key limes, zest 4-5 for 2 teaspoons of zest.
Halve and squeeze the limes to achieve ⅔ cup of juice.
Separate two eggs, reserving the whites for another use.
In a medium bowl, whisk to combine the egg yolks, 1 whole egg, condensed milk, and remaining ⅛ teaspoon kosher salt.
Whisk in the key lime juice and zest.
Pour the egg mixture into the prepared pie crust and bake it on a lower rack for 20-25 minutes or until the center is set or with a very slight jiggle.
Cool the pie on a wire rack, then chill at least 4 hours or overnight.
Garnish with whipped cream, zest, and sliced limes if desired, and serve.