In a small bowl, whisk together flour and baking powder; whisk until combined and set aside.
In your mixer's bowl, combine eggs, sugar and vanilla; beat for 1 minute or until pale yellow and fluffy.
Add flour mixture to egg mixture; set mixer on low and continue to mix until combined, about 15 seconds.
Preheat oven to 425.
Remove prepared crust from fridge.
Spoon previously prepared apple-mixture into the crust.
Pour cake batter over apples.
Bake for 10 minutes.
Reduce heat to 350 and continue to bake for 30 to 35 minutes, or until top is lightly browned and set.
Remove from oven and let cool at least 20 minutes.