Preheat the oven to 350°F / 175°C. Pulse 11 full-sheet graham crackers and ½ cup of salted macadamia nuts into coarse crumbs in a food processor.
Stir in 2 tablespoons of granulated sugar and 5 tablespoons of melted unsalted butter. Press into the bottom and up the sides of an ungreased 9in / 23cm pie dish. Bake for 8 minutes.
Whisk 794g of full-fat sweetened condensed milk, 1 cup of key lime juice, and 4 large egg yolks. Whisk in 1 teaspoon of key lime zest and pour into the warm crust.
Bake for 18-20 minutes, until only slightly jiggly in the center. Cool completely on a wire rack, then cover and refrigerate for at least 1 hour.
