Preheat the oven to 350°.
Line a 9-inch pie plate with 1 crust. Trim the crust leaving a 1-inch overhang around the edge. set it aside.
In a large bowl, combine the peaches, grated orange zest, extract, and lemon juice.
In another bowl, combine the sugar, salt, nutmeg, and cornstarch. Add to the peach mixture, and toss gently to coat. Pour the mixture into the crust, and dot with the butter.
Roll out the remaining crust sheet to a ⅛-inch thick circle. Cut into strips. Arrange over the top of the pie mixture in a lattice pattern.
Trim and seal the strips to the bottom crust. Fold the overhang over the lattice pattern. Lightly press, pinch or flute the edges. Cover the edges loosely with foil.
Bake for about 40 minutes. Remove the foil, and bake until the crust is golden brown and the filling is bubbling about 15 minutes longer.
Cool on a wire rack. Store in the refrigerator till ready to serve.