01 - Preheat oven to 325°F. Line a 12-cup muffin tin with paper liners.
02 - Combine graham cracker crumbs, sugar, and melted butter in a bowl until evenly moistened. Divide mixture among lined muffin cups, using about 1 tablespoon per cup. Press firmly into the bottom of each liner to form compact crusts.
03 - Bake crusts for 5 minutes until slightly set. Remove from oven and allow to cool while preparing filling.
04 - Beat softened cream cheese and sugar together in a mixing bowl until completely smooth and creamy, about 2 minutes. Add egg, vanilla extract, lemon juice, and lemon zest. Mix until just combined, being careful not to overbeat. Gently fold in sour cream until incorporated.
05 - Divide cheesecake batter evenly among the pre-baked crusts, filling each cup about three-quarters full.
06 - Combine blueberries, sugar, and lemon juice in a small saucepan over medium heat. Cook for 3–5 minutes, stirring occasionally, until berries burst and release their juices, creating a thick compote. Remove from heat and let cool slightly.
07 - Spoon a small amount of cooled blueberry compote onto each cheesecake and gently swirl with a toothpick or knife. Bake for 15–17 minutes until centers are just set and no longer jiggly.
08 - Let cheesecakes cool in the muffin tin for 30 minutes. Remove from tin and refrigerate for at least 1 hour to fully set before serving.
09 - Top each cheesecake with fresh blueberries and additional lemon zest just before serving.