Creating your Peach Mango Pie is a simple process. Just follow these steps:

1. Preheat the Oven: Preheat your oven to 425°F (220°C).

2. Prepare the Filling: In a mixing bowl, combine the sliced peaches and diced mangoes with granulated sugar, cornstarch, lemon juice, vanilla extract, ground cinnamon, and salt. Toss until the fruits are well-coated.

3. Prepare the Pie Crust: Roll out the pre-made pie crust and fit it into a 9-inch pie pan, ensuring you leave a bit of overhang.

4. Fill the Pie: Pour the fruit filling into the prepared pie crust, spreading it evenly.

5. Dot with Butter: Cut the unsalted butter into small pieces and dot it on top of the fruit filling.

6. Prepare for Baking: Fold the overhanging pie crust over the filling (you can create a lattice pattern if desired) to prevent spillage during baking.

7. Make the Egg Wash: In a small bowl, beat the egg with milk. Brush the egg wash over the crust for a golden finish.

8. Bake the Pie: Place the pie in the preheated oven and bake for 40-45 minutes, or until the crust is golden brown and the filling is bubbly.

9. Cool the Pie: Once baked, remove the pie from the oven and let it cool for 15-20 minutes before slicing. This allows the filling to set properly.

10. Serve and Enjoy: Your Peach Mango Pie is now ready to be enjoyed by family and friends!