Easy French Peach Pie

1 recipe pastry for a single 9-inch pie crust

1 (28 ounce) can sliced peaches, drained

1 cup white sugar

1 egg

1 tablespoon all-purpose flour

1 teaspoon butter

¼ teaspoon ground cinnamon, or to taste

Preheat an oven to 450 degrees F (230 degrees C). Press pie pastry into a 9-inch pie pan.

Fill prepared pie crust with peaches. Mix sugar, egg, flour, butter, and cinnamon together in a bowl; pour over peaches.

Bake in the preheated oven for 15 minutes. Reduce heat to 350 degrees F (175 degrees C); bake until peach filling is bubbling and crust is lightly browned, 40 to 45 minutes.