Preheat oven to 350ºF.
In a mixing bowl, combine all the crust ingredients; reserve 1 tbsp. of the mixture for later.
Press the remaining in the bottom and up the sides of a 10-inch pie plate. Transfer to the fridge.
In a medium saucepan over medium heat, add the filling ingredients and whisk well.
Bring the mixture to a boil and stirring constantly, cook until the mixture thickens, about 3 to 4 minutes.
Remove from the heat and allow to cool for 3 to 5 minutes.
Meantime, make the meringue. (see the recipe)
To assemble…Pour the filling into the prepared crust and level it out with a spatula. Sprinkle cornstarch on top of the pudding to absorb any humidity. Spread the meringue over the filling, sealing it to the edges of the crust with a spatula and make peaks. Sprinkle the remaining 1 tbsp. graham crust on top.
Transfer to the preheated oven and bake for 10 minutes or until the meringue is golden brown.
Remove from the heat and place the pie on a wire rack; let it cool for 1 hour at room temperature.
Transfer to the fridge, uncovered, for 3 hours. If you leave the pie in the fridge longer than 5 hours, cover it with foil.