Mile high lemon meringue pie

Ingredients

• 1 single crust pie dough
• 1 1/4 cups sugar
• 1 cup lemon juice about 5-6 lemons
• 2 tbsp grated lemon zest
• 1/2 cup water
• 3 tbsp cornstarch
• 1/4 tsp salt
• 8 large egg yolks
• 4 tbsp unsalted butter, cut into 4 pieces
• 1 cup sugar
• 4 large egg whites
• 1/2 tsp cream of tartar
• 1/2 tsp vanilla extract