Creating the Apple Crumble Cheesecake can be straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 325°F (160°C). Grease a 9-inch springform pan to ensure easy removal later.

2. Make the Crust: In a medium bowl, mix graham cracker crumbs, granulated sugar, and melted butter until well combined. Press the mixture firmly into the bottom of the prepared pan.

3. Prepare the Apple Filling: In a large bowl, toss the sliced apples with granulated sugar, cinnamon, and lemon juice. Set aside to let the flavors meld.

4. Mix the Cheesecake Filling: In another bowl, beat the softened cream cheese and sugar until smooth. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract, sour cream, and cinnamon until blended.

5. Layer the Filling: Pour half of the cheesecake batter into the prepared crust. Top with the apple filling and spread it evenly over the cheesecake layer. Finally, pour the remaining cheesecake batter on top, smoothing it out gently.

6. Prepare the Crumble Topping: In a separate bowl, mix the flour, rolled oats, brown sugar, and cinnamon. Drizzle in the melted butter and stir until the mixture becomes crumbly.

7. Add the Crumble: Sprinkle the crumble topping over the cheesecake mixture evenly.

8. Bake: Place the pan in the preheated oven and bake for 50-60 minutes, or until the center is set and the edges are lightly golden.

9. Cool the Cheesecake: Once baked, turn off the oven and crack the door. Let the cheesecake cool in the oven for 1 hour to prevent cracking. Then, transfer to the fridge and cool for an additional 1-2 hours or until fully chilled.

10. Remove from Pan: Carefully run a knife around the edge and release the springform pan. Slice and serve!