In a large bowl, combine the blueberries, sugar, corn starch, lemon zest, vanilla, salt. Mix them well.
Pour the blueberry filling into the pie crust and bake for 55-60 minutes at 425*F.
Give your pie plenty of time to cool off. Cool for 1-2 hours at room temperature and in the fridge for another few hours. This gives the filling time to set and harden.
Once the pie has cooled, slice and enjoy with some whipped cream or vanilla ice cream!