Creating these Apple Crisp Mini Cheesecakes can be simple if you follow these steps:

1. Preheat Your Oven: Start by preheating your oven to 325°F (160°C).
2. Prepare the Crust: In a medium bowl, mix graham cracker crumbs, granulated sugar, and melted butter until well combined. Firmly press this mixture into the bottom of lined muffin tins to form the crust.
3. Bake the Crust: Place the crusts in the oven and bake for about 10 minutes or until lightly golden. Remove and set aside to cool.
4. Make the Cheesecake Filling: In a large bowl, beat the softened cream cheese with an electric mixer until smooth. Gradually add in 3/4 cup granulated sugar and vanilla extract. Mix until combined, then add eggs one at a time, mixing well after each addition.
5. Prepare the Apples: In a separate bowl, combine the diced apples, cinnamon, nutmeg, and lemon juice. Toss until the apples are evenly coated.
6. Add Apples to Cheesecake Mixture: Carefully fold the apple mixture into the cheesecake batter until evenly distributed.
7. Fill Muffin Tins: Pour the cheesecake batter over the baked crusts in the muffin tins, filling to about 3/4 full.
8. Prepare the Crisp Topping: In another bowl, combine oats, brown sugar, all-purpose flour, and a pinch of salt. Drizzle in melted butter and mix until crumbly.
9. Top the Cheesecakes: Sprinkle the oat mixture generously over each filled cheesecake.
10. Bake: Place back in the oven and bake for an additional 15-20 minutes or until set. The edges should be slightly puffed.
11. Cool: Remove from the oven and allow to cool in the pan for 10 minutes. Then, transfer to a wire rack to cool completely.
12. Chill: Refrigerate for at least 1 hour to set before serving.

Following these steps will guide you in effortlessly creating these incredible desserts!