Instructions:

Step 1: Preheat the Oven 🔥
Preheat your oven to 400°F (200°C) .
Lightly grease a 10×15-inch jelly roll pan or a large baking sheet with cooking spray or butter.

Step 2: Make the Crust 🥄
In a large mixing bowl, combine the flour and salt .
Cut in the chilled shortening using a pastry cutter or your fingers until the mixture resembles coarse crumbs.
Gradually add the cold water , one tablespoon at a time, mixing gently with a fork until the dough comes together.
Divide the dough into two equal portions. Roll out one portion on a lightly floured surface to fit the bottom of your prepared pan. Carefully transfer it to the pan, pressing it gently into the edges.

Step 3: Prepare the Apple Filling 🍏
In a large bowl, toss the sliced apples with lemon juice to prevent browning.
Add the white sugar , flour , cinnamon , nutmeg (if using ), and mix well to coat the apples evenly.
Pour the apple mixture into the crust-lined pan, spreading it out evenly.

Step 4: Top the Pie 🥧
Roll out the second portion of dough to fit the top of the pan. Place it over the apples, trimming any excess dough.
Seal the edges by crimping with a fork or your fingers. Cut a few slits in the top crust to allow steam to escape during baking.
Optional: Brush the top crust with beaten egg and sprinkle with coarse sugar for a golden, sparkling finish.

Step 5: Bake the Pie 🍳
Bake in the preheated oven for 40–45 minutes , or until the crust is golden brown and the filling is bubbly.
Tip: Place a baking sheet lined with foil on the rack below to catch any drips and make cleanup easier.

Step 6: Cool and Serve 🍴
Let the slab pie cool slightly before slicing into squares.
Serve warm with a scoop of vanilla ice cream or a dollop of whipped cream for an extra indulgent treat.

Tips for Success:
Prevent Soggy Crust: Sprinkle a little flour or breadcrumbs on the bottom crust before adding the filling to absorb excess moisture.
Customize the Apples: Use a mix of sweet and tart apples for a balanced flavor.
Make Ahead: Assemble the pie up to a day in advance, cover, and refrigerate until ready to bake. Add a few extra minutes to the baking time if starting from cold.
Storage: Store leftovers in an airtight container at room temperature for up to 2 days or in the refrigerator for up to 5 days .
Nutritional Information (per serving, serves 12):
Calories: ~280
Protein: ~3g
Carbohydrates: ~40g
Fat: ~14g