Preheat oven to 325°F. Mix graham crumbs, sugar, salt, and melted butter. Press into lined muffin tin cups.
Bake crusts for 5 minutes. Remove and let cool slightly.
Beat cream cheese and sugar until smooth. Add eggs one at a time, then sour cream, lemon juice, zest, vanilla, and flour. Mix until just combined.
Divide filling evenly among muffin cups.
Place muffin tin in roasting pan and fill with hot water halfway up the sides. Bake for 22 minutes. Cool in oven, then transfer to fridge to chill for 4 hours.
Let cheesecakes cool completely in fridge (at least 4 hours).
In saucepan, combine blueberries, sugar, water, cornstarch, and lemon juice. Cook over medium heat until thickened. Cool completely.
Top each cheesecake with blueberry mixture. Serve chilled.
Notes
Nutrition information is automatically calculated, so should only be used as an approximation.