Mix flour, sugar, and salt; cut in butter; add ice water to form dough. Divide, wrap, and chill for 1 hr.
Toss peaches with sugars, cornstarch, lemon juice, vanilla, cinnamon, and nutmeg; taste and adjust.
Roll one dough disk; fit it into a 9-inch white ceramic pie dish. Add filling.
Roll the second disk; top with solid or lattice crust, crimp edges.
Brush with egg wash, sprinkle with coarse sugar. Bake at 400°F for 50–60 min.
Cool 2 hr; serve in a dish or on a white ceramic platter with cream, wine.