Follow these steps to create your Classic Apple Pie:

1. Prepare the Crust: In a large bowl, mix 2 ½ cups of flour, 1 teaspoon of salt, and 1 tablespoon of sugar. Add the diced butter and mix until the mixture resembles coarse crumbs.
2. Add Water: Stir in the ice water, one tablespoon at a time, until the mixture comes together. Divide it into two balls, flatten them into discs, and wrap in plastic. Refrigerate for at least 1 hour.
3. Preheat Oven: Preheat your oven to 425°F (220°C).
4. Prepare Apples: Peel, core, and slice the apples. In a large bowl, toss the apple slices with ¾ cup sugar, 2 teaspoons cinnamon, ¼ teaspoon nutmeg, 1 tablespoon lemon juice, and 2 tablespoons flour.
5. Roll Out Dough: On a floured surface, roll out one disc of chilled dough to fit your pie dish. Place it in the dish and trim the edges.
6. Add Filling: Spoon the apple mixture into the crust. Dot with butter.
7. Top Crust: Roll out the second disc of dough and place it over the filling. Cut slits in the top for steam to escape. Trim and crimp the edges to seal.
8. Egg Wash: In a small bowl, whisk together the egg and milk. Brush the mixture over the crust for a golden finish.
9. Bake: Bake in the preheated oven for 15 minutes. Then reduce the temperature to 350°F (175°C) and continue baking for an additional 30-35 minutes, or until the apples are tender and the crust is golden brown.
10. Cool: Remove from the oven and let the pie cool for at least 30 minutes before serving.

These steps will guide you in making an incredible Classic Apple Pie that is sure to impress!