lemon meringue pie

Ingredients

• 1 - pie shell, baked
• 1 1/2 cups sugar
• 6 tablespoons cornstarch
• 1 pinch salt
• 1 1/3 cups cold water
• 2 tablespoons butter, room temperature
• 6 - egg yolks, reserve whites
• 1/2 cup lemon juice
• 1 tablespoon lemon rind, grated
• 6 - egg whites
• 1 pinch cream of tartar
• 1 pinch salt
• 3/4 cup sugar