Follow these steps to create your Rustic Peach Pie successfully:

1. Preheat the Oven: Preheat your oven to 425°F (220°C).
2. Prepare the Peaches: In a large bowl, combine the sliced peaches, granulated sugar, flour, cinnamon, nutmeg, and lemon juice. Toss well to coat the peaches evenly.
3. Prepare the Pie Crust: Roll out one pie crust and fit it into a 9-inch pie pan. Trim any excess dough hanging over the edges.
4. Fill the Pie: Pour the peach mixture into the pie crust, ensuring even distribution. Dot the filling with small pieces of butter.
5. Top the Pie: Roll out the second pie crust and place it over the filling. You can cut slits for venting or create a lattice top for a rustic look. Trim and crimp the edges to seal.
6. Apply Egg Wash: Brush the top crust with the beaten egg and sprinkle coarse sugar over the top for added sweetness and texture.
7. Bake: Bake in the preheated oven for 45-50 minutes or until the crust is golden brown and the filling is bubbly.
8. Cool: Remove the pie from the oven and let it cool for 15-20 minutes before slicing. This allows the filling to set.

These straightforward steps will guide you in creating this incredible Rustic Peach Pie effortlessly.