Mix the graham cracker crumbs and sugar in a medium sized bowl before pouring in the melted butter.
Once the mixture is thoroughly blended, pat the crumbs down, as evenly as possible, into a pie plate. (Be sure there are no thin/open spots in the crust.)
Put the pie plate into the 350 degree oven for about 8 minutes.
Then, set it on the counter to cool and set while making the filling.
Make Lemon Blueberry Pie Filling
Mix all pie filling ingredients, in the order listed, in a medium bowl and mix vigorously until all the lumps are gone, using an electric mixer. Do not over-mix once the blueberries are added to prevent blue streaks as much as possible.
Bake Pie
Pour filling into the pie shell and place in the oven for 5 to 8 minutes or until tiny pinhole bubbles start to rise.
Once out of the oven, let the pie cool a good while on the counter before placing it in the fridge to chill for at least three hours. (It is best to let it chill as long as possible – overnight is ideal.
Top each slice with Cool Whip and fresh blueberries when serving.