High Altitude Pie Meringue

Combine cornstarch, sugar, and salt in a glass or ceramic container. Gradually add water to the mixture and stir until well combined. Microwave on high for 2 minutes, or until the mixture has thickened and clarified. Allow it to cool slightly before proceeding.

In a large glass or metal bowl, beat egg whites until they become light and airy. Continue to whip the egg whites until they become stiff and hold their shape when a peak is formed. Gradually pour in the sugar mixture you prepared earlier, whipping continuously until stiff peaks form.

Cover the entire surface of the pie filling with the meringue, ensuring a tight seal around the edges. Place the pie in the oven and bake according to the original instructions, or in a preheated oven at 450 degrees F (220 degrees C), for 7 to 8 minutes, or until it reaches a golden brown color.