Ingredients:
* Homemade All Butter Pie Crust or 2 pre-made, ready to roll pie crusts
* 4 egg yolks + 1 egg for egg wash
* 1/3 cup cornstarch
* 1 1/2 cups water
* 1 1/3 cups sugar
* 1/4 teaspoon salt
* 1/2 cup lemon juice
* 1 tablespoon finely grated lemon zest
* 3 tablespoons butter
Meringue:
* 4 egg whites, at room temperature
* 1/2 tsp. cream of tartar
* Pinch of salt
* 3/4 cup sugar