Instructions: 1. Prepare the Pie Crust: In a large mixing bowl, combine the flour and salt. Add the cubed butter and use a pastry cutter or fork to cut the butter into the flour until the mixture resembles coarse crumbs.
2. Preheat the Oven: Preheat your oven to 375°F (190°C).
3. Prepare the Apple Filling: In a large bowl, combine the sliced apples, granulated sugar, brown sugar, flour, cinnamon, nutmeg, and lemon juice. Toss until the apples are evenly coated with the sugar mixture.
4. Prepare the Pistachio Crumble Topping: Add the cold cubed butter and use your fingers or a pastry cutter to work the butter into the dry ingredients until the mixture resembles coarse crumbs.
8. Bake: Place the pie in the preheated oven and bake for 45 to 50 minutes, or until the crust is golden brown and the filling is bubbly.
6. Cool and Serve: Allow the pie to cool on a wire rack for at least 30 minutes before serving. Serve warm or at room temperature. Enjoy your delicious apple pistachio pie!