Preheat your oven to 350°F (175°C) and grease a 9x9-inch baking dish.
In a large mixing bowl, combine the cottage cheese, rolled oats, blueberries, honey (or maple syrup), eggs, vanilla extract, baking powder, salt, and cinnamon. Stir until all ingredients are well mixed and combined.
If using, fold in the chopped nuts for added crunch and protein.
Pour the mixture into the greased 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 slightly before slicing into squares.