Prepare the Crust: Roll out your chilled tart crust to fit the pie pan, press it into the edges, trim excess, and crimp edges. Chill for 30 minutes.

Make the Crumble Topping: Combine flour, granulated sugar, brown sugar, and cinnamon, mix in softened butter until crumbly. Chill topping.

Prepare the Apple Filling: Peel, core, and slice apples. Mix with sugars, cinnamon, nutmeg, salt, and lemon juice. Let sit for 15 minutes.

Assemble the Pie: Fill chilled crust with apple mixture, mound in center, and add crumble topping pressing down lightly.

Bake the Pie: Preheat oven to 400°F, bake for 20 minutes, then lower to 375°F and bake for additional 40-45 minutes until golden brown.

Cool the Pie: Let the pie cool on a wire rack for at least 4 hours before serving.