Graham Cracker Pie

Recipes for casserole pies "sky-high heights" are a hit of dessert buffets throughout the year. Combine with fresh seasonal berries.
Preheat the oven to 350 degrees.To make the cake, mix the first 3 ingredients and mix well with a whisk. Add the melted butter; stir until smooth. Reserve 2 tablespoons of the crumble mixture; set aside. Squeeze the remaining mixture onto the bottom and top sides of a 9-inch pie dish coated with cooking spray; lightly brush the cake with cooking spray. Bake at 350 ° C for 15 minutes and remove from the oven. Reduce the oven temperature to 325 degrees.To make the filling, combine 1/2 cup sugar, cornstarch, and salt in a saucepan; stir in the milk. Bring the mixture to a boil over medium-high heat. Cook for 1 minute, stirring constantly. Gradually add the hot milk mixture to the eggs, stirring constantly with a whisk. Return the mixture to the mold. Cook over medium heat until thickened (about 2 minutes), stirring constantly. Remove from heat and add 1/4 teaspoon vanilla. Pour the hot filling over the prepared cake.To make the meringue, place the egg whites and tartar in a large bowl; beat with a mixer on high speed until frothy. Add 1/2 teaspoon vanilla and beat well. Gradually add 1/3 cup sugar, 1 tablespoon at a time, whisking until stiff peaks form. Spread the meringue evenly over the hot filling, fitting snugly to the edge of the cake. Sprinkle with the remaining crumble mixture. Bake at 350 ° C for 15 minutes or until the meringue is golden brown. Cool for 1 hour on a wire rack. Refrigerate for at least 2 hours.