Heat oven to 425º F.
Whisk together the sugar, cornstarch, lemon zest and salt. Do your best to break up the corn starch lumps.
Roll out the bottom crust and place in a 9" pie plate.
Sprinkle the sugar mixture over the blueberries, lemon juice and gently shake the bowl to distribute the sugar through the berries.
Pour the sugar coated berries into the prepared, unbaked piecrust.
Dot the berries with the butter.
Roll out the top pie crust and cut the crust into strips for a lattice top or leave whole for a more traditional crust.
Follow my instructions for weaving a lattuce pie crust. or place the top crust on the berries.
Fold top crust under bottom crust edge to seal.
Crimp and flute edges. Cut slits in top crust to allow steam to escape if not making a lattice top pie.
Place foil around the edges of the pie to prevent over baking.
Bake at 425 for 15 minutes.
Remove the foil from the edge of the pie and drop the temperature to 350.
Bake for an additional 45 minutes or until the filling in center is bubbly and crust is golden brown.
Cool to room temperature before serving and chill until firm for best slicing results.
Serve with fresh whipped cream or a scoop of ice cream for a la mode pie.