Creating this Apple Crisp Cheesecake involves several key steps. Follow these instructions for the best results:

1. Preheat the Oven: Preheat your oven to 325°F (165°C).

2. Prepare the Crust:
– In a mixing bowl, combine the graham cracker crumbs, melted butter, and sugar.
– Press the mixture into the bottom of a 9-inch springform pan.
– Bake for 10 minutes, then let it cool.

3. Prepare the Apple Filling:
– In a large bowl, toss the sliced apples with lemon juice, cinnamon, nutmeg, and brown sugar.
– Set aside to allow the mixture to marinate.

4. Make the Cheesecake Filling:
– In a large mixing bowl, beat the cream cheese until smooth and creamy.
– Gradually mix in the sugar, then add the vanilla and eggs, one at a time, mixing well after each addition.
– Blend in sour cream and flour until thoroughly combined.

5. Assemble the Cheesecake:
– Pour half of the cheesecake filling into the cooled crust.
– Layer half of the marinated apple mixture on top.
– Pour the remaining cheesecake filling over the apples, smoothing it out, and then top with the remaining apple mixture.

6. Prepare the Crisp Topping:
– In a separate bowl, combine oats, flour, brown sugar, cinnamon, and melted butter.
– Mix until crumbly, then sprinkle evenly over the apple layer on the cheesecake.

7. Bake:
– Bake in the preheated oven for 55-60 minutes or until the center is set but still slightly jiggly.
– Turn off the oven, crack the oven door, and let the cheesecake cool in the oven for 1 hour.

8. Chill:
– Cover the cheesecake carefully and refrigerate for at least 4 hours, preferably overnight.