Follow these simple steps to create the Best Blueberry Pie:

1. Preheat the Oven: Preheat your oven to 425°F (220°C).
2. Prepare the Pie Crust: Roll out one half of the pie crust to fit a 9-inch pie pan. Place it in the pan and refrigerate while preparing the filling.
3. Mix the Filling: In a large mixing bowl, combine the fresh blueberries, granulated sugar, cornstarch, lemon juice, vanilla extract, and ground cinnamon. Gently toss the ingredients until the blueberries are evenly coated.
4. Fill the Pie: Pour the blueberry filling into the prepared pie crust, spreading it evenly. Dot the top with small pieces of unsalted butter.
5. Prepare the Top Crust: Roll out the second half of the pie crust and place it over the blueberry filling. Trim any excess crust and crimp the edges to seal the pie.
6. Vent the Pie: Cut a few slits in the top crust to allow steam to escape during baking.
7. Egg Wash: In a small bowl, whisk together the egg and milk. Brush this mixture over the top crust for a golden finish.
8. Bake: Place the pie in the preheated oven and bake for 45 minutes, or until the crust is golden and the filling is bubbling.
9. Cool: Remove the pie from the oven and allow it to cool for at least 15 minutes before serving. This will help thicken the filling.
10. Serve: Enjoy warm or at room temperature as desired.

Following these steps will guide you in creating this incredible pie effortlessly!