01 - Combine bread flour, sourdough starter, water, and salt in a large bowl. Mix until a shaggy dough forms. Cover and let rest for 30 minutes.
02 - Perform 2–3 sets of stretch and folds over 1.5 hours, allowing 30 minutes of rest between each set. After the final fold, cover and refrigerate the dough overnight for 8–12 hours.
03 - Generously oil a 9x13-inch baking pan. Transfer the chilled dough to the pan, gently stretching to fit. Cover and let rise at room temperature for 2–3 hours until very puffy.
04 - Beat cream cheese, sugar, egg yolk, vanilla, and lemon zest in a medium bowl until completely smooth and creamy. Set aside.
05 - Toss fresh raspberries with sugar and lemon juice in a small bowl. Let stand while the dough completes its rise.
06 - Preheat oven to 425°F.
07 - Using oiled fingers, create deep dimples across the surface of the risen dough. Dollop the cheesecake mixture evenly over the top, then gently swirl with a knife or spatula. Scatter the sugared raspberries and their juices across the dough.
08 - Drizzle additional olive oil over the surface. Bake for 25–30 minutes until golden brown, set in the center, and edges are crisp.
09 - Let cool in the pan for at least 30 minutes before slicing. Serve warm or at room temperature for best texture.