Preheat oven to 425°F (220°C)
Prepare a pie crust and place one crust in a 9-inch pie dish
Peel, pit, and slice 6 to 8 peaches
In a bowl, mix peaches with 3/4 cup sugar, 1/4 cup flour, 1 tablespoon lemon juice, 1/2 teaspoon cinnamon, and a pinch of salt
Pour the peach filling into the crust
Dot the filling with 2 tablespoons butter
Cover with a second crust or make a lattice top
Cut slits in the top crust if using a full crust
Brush the top with milk or beaten egg
Sprinkle with sugar if desired
Bake for 20 minutes
Reduce oven temperature to 375°F (190°C)
Bake for 30 to 40 minutes more until the crust is golden and filling is bubbling
Cool for at least 2 hours before slicing