Preheat your oven to 350 degrees. Grease a 9 inch spring form pan with baking spray. Set aside.
In a large mixing bowl combine the eggs, sugar, ricotta and vanilla and mix well with a spoon.
Add in the oil, zest and cinnamon and mix to combine.
Stir in the flour and baking powder little by little and mix until fully combined.
Fold in the chunks of apples and pour into prepared pan.
Arrange the sliced apples on top and sprinkle with sugar.
Bake for 60 minutes or until the apples are golden.