Preheat oven to 350°F (175°C).

In a large bowl, beat eggs until light and frothy.

Gradually add sugar while continuing to beat until well combined.

In a separate bowl, whisk together flour, baking powder, and salt.

Add the dry ingredients to the wet ingredients and mix until just combined.

Gently fold in the chopped apples and nuts.

Pour the mixture into a 9-inch pie tin.

Bake for 30 minutes, or until golden brown and a toothpick inserted into the center comes out clean.

Let cool slightly before serving.

Serve warm with whipped cream or Cool Whip.