Prepare the crust by combining graham cracker crumbs and melted butter.
Press the mixture into the bottom of a muffin tin lined with cupcake liners.
Bake the crust in a preheated oven at 350°F (175°C) for 8–10 minutes.
In a mixing bowl, beat the softened cream cheese and sugar until smooth.
Add the vanilla extract and eggs to the cream cheese mixture and mix until combined.
Fold in the chopped apples and half of the caramel sauce gently into the cheesecake mixture.
Spoon the cheesecake filling over the baked crust in each muffin liner, filling to the top.
Bake the mini cheesecakes in the oven for 18–20 minutes, or until set but slightly jiggly in the center.
Remove from the oven and let cool before refrigerating for at least 4 hours.
Top with remaining caramel sauce and oat crumble before serving.