Preheat your oven to 350°F (175°C) and lightly grease an 8x8-inch baking dish.
In a large mixing bowl, combine the cottage cheese, milk, honey (or maple syrup), eggs, and vanilla extract. Mix well until smooth.
In another bowl, whisk together the rolled oats, baking powder, cinnamon, and salt.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Gently fold in the blueberries and nuts (if using) until evenly distributed.
Pour the mixture into the prepared baking dish and spread it evenly.
Bake in the preheated oven for 30-35 minutes, or until the top is golden brown and a toothpick inserted in the center comes out clean.
Allow to cool for a few minutes before slicing into squares and serving.