Lemon bluberry mini cheesecake

1 cup graham cracker crumbs2 tablespoons granulated sugar4 tablespoons unsalted butter, meltedFor the Cheesecake Filling:16 oz (2 packages) cream cheese, softened2/3 cup granulated sugar2 large eggs1/4 cup sour cream1/4 cup fresh lemon juice (about 2 lemons)1 tablespoon lemon zest1 teaspoon vanilla extractFor the Blueberry Sauce:1 cup fresh or frozen blueberries2 tablespoons granulated sugar1 tablespoon lemon juice1 teaspoon cornstarch mixed with 1 tablespoon water