1. Make the Crust:

1. In a bowl, mix graham cracker crumbs, sugar, and melted butter until combined.
2. Divide evenly between 4 small jars or glasses, pressing the mixture down gently.
3. Chill in the fridge while preparing the filling.

2. Prepare the Cheesecake Filling:

1. In a large bowl, beat the cream cheese, powdered sugar, and vanilla extract until smooth.
2. In a separate bowl, whip the heavy cream until stiff peaks form.
3. Gently fold the whipped cream into the cream cheese mixture until fully combined.
4. Spoon or pipe the cheesecake filling over the crust in each jar.

3. Make the Apple Topping:

1. In a small saucepan over medium heat, combine diced apples, brown sugar, cinnamon, nutmeg, and lemon juice.
2. Cook for 5 minutes, stirring occasionally, until apples are softened.
3. In a small bowl, mix cornstarch with water, then stir into the apples to thicken the mixture.
4. Remove from heat and let cool slightly.

4. Assemble & Serve:

1. Spoon the cooled apple topping over the cheesecake layer in each jar.
2. Top with whipped cream, caramel sauce, or chopped nuts if desired.
3. Serve immediately or chill for 1-2 hours for a firmer texture.