Combine the first four ingredients into the pint container. Use a hand blender to blend until smooth. Make sure that the mixture stays below the fill line.
Freeze the container on a flat surface for 24 hours or until frozen solid.
Remove from the freezer, run under hot water for 30 seconds, and take off the lid. Place the container into the outer bowl of the Ninja Creami and lock the lid in place.
Secure the outer bowl into the Ninja Creami machine. Press the Lite Ice Cream button and let the cycle run.
If the ice cream looks powdery, put it back in the machine and press the respin button.
While the ice cream is mixing, prepare the apple pie filling.
In a small saucepan, combine butter, brown sugar, and diced apple. Heat on medium, stirring constantly until the apples are tender (about 5 minutes). Stir in cinnamon and let cool completely.
Make a small hole in the center of the ice cream and add the apple filling. Mix again using the “mix-in” button.
Top with graham cracker crumbs and enjoy!