Prepare the Graham Cracker Crust

1. Preheat Oven: Preheat your oven to 325°F (165°C). Line a 12-cup muffin tin with paper liners.
2. Mix the Crust: In a bowl, combine graham cracker crumbs, sugar, and melted butter. Stir until the mixture resembles wet sand.
3. Press Into Liners: Divide the crust mixture evenly among the liners, pressing firmly to form an even layer. Use the back of a spoon or a small glass for best results.
4. Bake: Bake for 8-10 minutes, then let cool completely while preparing the cheesecake layer.

Prepare the Cheesecake Layer

1. Beat Ingredients: In a large mixing bowl, beat the cream cheese and sugar until smooth. Add the vanilla extract and mix until combined.
2. Add Eggs: Add eggs one at a time, mixing on low speed after each addition to avoid overmixing.
3. Fill the Liners: Spoon the cheesecake mixture over the cooled crusts, filling each liner about two-thirds full.
4. Bake: Bake for 15-18 minutes, or until the centers are set and slightly jiggly. Let cool at room temperature, then refrigerate for at least 2 hours.

Prepare the Blueberry Mousse

1. Cook the Blueberries: In a saucepan over medium heat, combine blueberries, sugar, and lemon juice. Cook until the berries burst and the mixture thickens, about 8-10 minutes.
2. Blend and Strain: Blend the mixture until smooth, then strain through a fine-mesh sieve to remove seeds.
3. Bloom the Gelatin: In a small bowl, sprinkle gelatin over cold water and let sit for 5 minutes. Microwave for 10 seconds to dissolve, then stir into the blueberry puree.
4. Whip the Cream: In a chilled bowl, whip the heavy cream until soft peaks form. Gently fold the whipped cream into the cooled blueberry mixture until combined.
5. Top the Cheesecakes: Spoon or pipe the mousse over the chilled cheesecakes. Smooth the tops with a spatula for a polished look.

Chill and Serve

1. Chill: Refrigerate the assembled cheesecakes for at least 3 hours, allowing the mousse to set.
2. Garnish: Before serving, garnish with fresh blueberries, mint leaves, or a sprinkle of powdered sugar for an elegant touch.