Preheat the oven to 450 degrees.
For the peaches: Over high heat, in a saute pan, heat the butter. When the butter is hot add the sugar. Stir until the sugar is dissolved. Add the peaches and saute for 5 to 6 minutes, or until the sugar starts to turn dark amber in color. Incorporate the brandy into the peach mixture. Carefully ignite the brandy and flambe the peaches. Remove from heat and allow to cool, about 10 minutes.
For the custard: In a mixing bowl, whisk all the ingredients together until fully incorporated. In an unbaked pie crust, spoon the brandied peaches over the pie crust. Place the crust in the oven and pour the custard into the shells. This prevents spilling the custard in the oven. Bake for 1 hour or until the custard sets. Place foil around the crust for the first 30 minutes and then remove. This keeps the crust from getting too brown. Allow to cool for about 30 minutes. Place a slice of the pie on the plate and garnish with powder sugar, whipped cream, and fresh mint.
For the crust: In a mixing bowl, combine the flour, salt and sugar. Add the shortening and work it through with your hands until the mixture resembles coarse crumbs. Add the water, 1 tablespoon at a time, and work it in with your hands until you have a smooth ball of dough. Wrap the dough in plastic and refrigerate for at least 30 minutes. Remove the dough from the refrigerator and place it on a lightly floured surface. This recipe will make two pie crusts.
For the individual crust: Divide the dough into fourths. Roll out the dough on the floured surface into a circle about 5 inches in diameter and 1/8-thick.
For the whole pie crust: Roll out the dough on the floured surface into a circle about 14 inches in diameter and 1/8 inch thick. Gently fold the circles of dough in half and then in half again so that you can lift it without tearing it, and unfold into a 9-inch pie pan.