01 - Preheat oven to 325°F. Line a 12-cup muffin tin with paper liners.
02 - Mix graham cracker crumbs, sugar, and melted butter until combined. Divide evenly among liners, about 1 tablespoon each, pressing firmly to form crust.
03 - Bake crusts for 5 minutes, then let cool slightly.
04 - Beat cream cheese and sugar until smooth and creamy. Add egg, vanilla, lemon juice, and lemon zest; beat until just combined. Fold in sour cream.
05 - Divide cheesecake batter among crusts.
06 - Heat blueberries, sugar, and lemon juice over medium heat until berries burst, 3-5 minutes. Let cool, then swirl a spoonful on top of each cheesecake before baking.
07 - Bake for 15-17 minutes, until centers are just set. Cool in pan for 30 minutes, then refrigerate at least 1 hour.
08 - Garnish with fresh blueberries and extra lemon zest if desired before serving.