Step 1

Whisk the flour, sugar, and salt together in a medium bowl. Using a pastry cutter or a couple forks, cut in the butter until the mixture resembles coarse, pea-sized crumbs. Add the water and stir until the flour is moistened. Add 1 more Tablespoon of water if the dough seems dry. Gently knead the dough a few times on a lightly floured work surface until it all comes together. Shape the dough into a ball and flatten it into a thick disk. Wrap it in plastic wrap and refrigerate it for at least 1 hour and up to 3 days (or freeze up to 3 months).

Step 2

Mix the apples, brown sugar, flour, lemon juice, cinnamon, and nutmeg together in a large bowl. Cover tightly and let sit until the dough is ready. I usually cover it and keep in the refrigerator during this time.

Step 3

Preheat oven to 375°F (190°C). Line a large baking sheet with parchment paper or a silicone baking mat. Set aside.

Step 4

On a lightly floured work surface, roll the dough into a 12-inch circle (or any shape, really!). Trim the rim of the circle to make a clean cut if desired. Transfer dough to the prepared baking sheet.

Step 5

Arrange the apples (not the juices) into the center of the dough, leaving a 2-3 inch border all around. Gently fold the edges of the dough over the apples, overlapping the dough as necessary. Press gently to seal the edges. Drizzle 3 Tablespoons of salted caramel over the filling (not the crust). Brush the crust edges with egg wash and sprinkle the whole thing with walnuts, if using.

Step 6

Bake until the filling is bubbly and the crust is golden brown, about 35-38 minutes. Allow to cool on the baking sheet for 10 minutes before slicing and serving.

Step 7

Serve with extra salted caramel sauce drizzled on top.