01 - Preheat oven to 350°F. Lightly grease an 8-inch round or square baking dish, lining with parchment paper for easy removal if desired.
02 - Combine cottage cheese, Greek yogurt, sugar, lemon zest, lemon juice, vanilla, and salt in a large bowl. Mix thoroughly until completely smooth, using an immersion blender for the silkiest texture.
03 - Add eggs one at a time, whisking well after each addition to ensure proper emulsification.
04 - Sprinkle cornstarch over the mixture and stir until no dry spots remain.
05 - Gently fold in fresh raspberries with a spatula, taking care to avoid crushing the delicate fruit.
06 - Pour batter into the prepared dish and smooth the surface evenly with an offset spatula.
07 - Bake for 38 to 42 minutes until the center is firm and set, with lightly golden edges around the perimeter.
08 - Let cool completely to room temperature, then refrigerate for at least 2 hours to allow proper setting before slicing.
09 - Slice into portions and serve chilled or at room temperature, topped with additional fresh raspberries and a light dusting of powdered sugar if desired.