Preheat the oven to 450 degrees F (220 degrees C).
Prepare bottom crust by lining the bottom and sides of a 9 inch pie plate with one of the pie crusts.
Brush with some of the beaten egg white to keep the dough from becoming soggy later.
Place the sliced peaches in a large colander, and toss with lime juice. Mix gently. Let excess moisture escape colander.
In a separate bowl, mix together the flour, corn starch, sugar, cinnamon, nutmeg and salt. Add peaches, and mix gently.
Pour peach mixture into the pie crust, and dot with butter.
Use the other pie crust to create a lattice topping. Flute the edges to seal or press the edges with the tines of a fork dipped in egg white mixture.
Brush the remaining egg white over the top crust. Sprinkle with sugar in the raw.
Bake for 12 minutes in the preheated oven, then reduce the heat to 350 degrees F (175 degrees C) and bake for an additional 28 to 35 minutes, until the crust is brown and the juice begins to bubble through the lattice. If the edges begin to brown too fast, cover them with strips of aluminum foil about halfway through baking.
Cool completely before serving.