Preheat oven to 400°F (200°C).
Brush both sides of each tortilla with melted butter.
Mix sugar and cinnamon together in a shallow dish.
Dredge the buttered tortillas in the cinnamon sugar mixture.
Drape tortillas over the bars of an oven rack to create a taco shape.
Bake for 8-10 minutes until golden and crispy. Carefully remove and let cool.
For the cheesecake filling, beat cream cheese, powdered sugar, and vanilla extract together until smooth.
In a separate bowl, whip the heavy cream to stiff peaks.
Gently fold the whipped cream into the cream cheese mixture. Refrigerate until ready to use.
For the apple filling, melt butter in a skillet over medium heat.
Add diced apples, brown sugar, cinnamon, and nutmeg.
Cook until apples are tender, about 5 minutes. If you prefer a thicker filling, add the cornstarch slurry and cook for another minute.
Let the apple filling cool slightly.
To assemble, pipe or spoon cheesecake filling into each taco shell.
Top with a generous spoonful of apple filling.
Serve immediately for the best texture.