In a bowl, mix graham cracker crumbs, granulated sugar, and melted butter. Press the mixture into the bottom of a springform pan to form the crust.
In a large mixing bowl, beat the softened cream cheese until smooth. Add Greek yogurt, granulated sugar, and vanilla, mixing until well combined.
Add eggs one at a time, mixing well after each addition.
In another bowl, toss the sliced apples with granulated sugar and cinnamon.
Pour half of the cheesecake batter over the crust, then layer the apples on top. Pour the remaining cheesecake batter over the apples.
In a separate bowl, combine flour, rolled oats, brown sugar, and cinnamon. Stir in melted butter until crumbly. Sprinkle the crumble mixture over the cheesecake.
Bake for 60-70 minutes or until the center is set. Let it cool before removing from the springform pan.
Serve with salted caramel sauce if desired.
Notes
Make sure the cream cheese is softened for easier mixing.
For a richer flavor, use sour cream instead of Greek yogurt.
Let the cheesecake cool completely before slicing for best results.