Preheat oven to 375 degrees Fahrenheit (190 degrees Celsius) and grease an 8-inch square baking dish.

In a large mixing bowl, combine the cottage cheese, beaten eggs, maple syrup, lemon juice, and vanilla extract until uniform.

Whisk in the rolled oats, lemon zest, baking powder, and sea salt until thoroughly incorporated.

Gently fold 1 cup of fresh blueberries into the batter using a spatula to avoid crushing the fruit.

Transfer the mixture into the prepared baking dish and spread evenly.

Top the surface with the remaining 0.5 cup of blueberries.

Bake for 35 to 40 minutes or until the center is firm to the touch and the edges are golden brown.

Remove from the oven and let rest for 5 minutes to set the structure before slicing.