01 -
Place a rack in the middle of the oven and preheat to 400°F (200°C). Grease a 9-inch spring-form pan and line the bottom with parchment paper.
02 -
Gently roll the puff pastry out on a clean surface to ¼ inch thickness. Press the pastry inside the pan and up the sides. It's acceptable if the pastry doesn't extend fully up the sides. Transfer to the refrigerator to chill while preparing the batter.
03 -
In a medium-sized mixing bowl, beat together the cream cheese and sugar on medium speed until very smooth and creamy, about 2 minutes, scraping down the sides of the bowl as needed. Add the eggs one at a time, ensuring each is fully incorporated before adding the next. Scrape down the sides of the bowl, then reduce the mixer speed to medium-low. Add the heavy cream, vanilla, and salt, and beat until combined, about 30 seconds.
04 -
Sift the flour into the batter, then beat again to combine, about 30 seconds. Pour the batter into the prepared pastry-lined pan. Gently sprinkle the blueberries over the batter (some will sink). Fold the corners of the pastry over the berries. Sprinkle the top of the cake with 1-2 tablespoons granulated sugar.
05 -
Transfer to the oven and bake for 55-65 minutes, until deeply golden brown on top and still very jiggly in the center. Let the cake cool for 5 minutes, then unmold. Allow to cool completely before serving. Slice into wedges and serve at room temperature or chilled, with room temperature being optimal.