After 2 hours, take the pie dough disk out of the fridge and let it rest few minutes on the kitchen counter. The dough should stay cold but slightly warmed up to be able to roll it out without breaking it
Using a spatula or wooden spoon, mix peaches, sugar, corn starch, melted butter and your chosen spice just until combined and the peaches are coated.
Transfer the disk to a silicone baking mat or a lightly floured surface and start rolling it out, make sure you turn the dough with your hands after each rolling so it will become even. No need to add too much flour while rolling, the pie dough should be cold enough not to stick to the kitchen counter. If at any point the dough gets too warm, pop it back into the freezer for a minute to chill then continue
If you are using a Pie dish 9 inch / 23 cm, roll the dough to 12 inch / 30 cm in diameter. Remember, do not force the dough, after rolling, it should stay smooth and cold, and easy to work with. Place the peach filling into the pie dish. Then, cut the pie dough into 1 inch / 2cm even strips and make the lattice pattern as per below:
Layout the strips vertically on top of the filling. Fold every other strip back and place one of the (long) trips perpendicularly on top. Then unfold. Fold again every other vertical strip back. Lay one of the unused strips perpendicularly on top. Then unfold. Repeat until the peach filling is fully covered then fold the excess dough that lays over the edges back or cut it with a scissor.
Pre-heat the oven to 200 C / 372 F (no fan) while chilling the dough for 30 minutes in the fridge or 10 minutes in the freezer. Then, whisk an egg with a splash of milk and apply egg wash.
Bake the Cobbler at 200 C / 372 F (no fan) for 40 minutes. The baking is done when the filling is bubbling and the crust is golden brown.
You can serve the cobbler hot with a scoop of vanilla ice cream or whipped cream. Bear in mind that the filling will set as it cools.
Store the peach cobbler with pie crust refrigerated for up to 3 days.