Roll out the bottom pie crust and place it in the pie dish
Add the filling and chill if needed
Roll out the top crust into a circle or rectangle
Cut the top crust into even strips
Lay half the strips across the pie in one direction
Fold back every other strip halfway
Place one strip perpendicular to the first set
Unfold the folded strips over the new strip
Fold back the alternating strips
Place another perpendicular strip
Repeat until the lattice is complete
Trim the excess dough around the edges
Fold the bottom crust over the strip ends
Crimp the edges to seal
Brush with egg wash or milk if desired
Sprinkle with sugar if desired
Bake according to the pie recipe