01 - Preheat the oven to 350°F. Grease a 9x9-inch baking dish with butter.
02 - In a large bowl, whisk together the cottage cheese, eggs, milk, maple syrup or honey, vanilla extract, and melted butter until smooth.
03 - In a separate bowl, combine the rolled oats, baking powder, cinnamon, and salt.
04 - Add the dry ingredients to the wet mixture and stir until just combined.
05 - Gently fold in the blueberries.
06 - Pour the mixture into the prepared baking dish. Smooth the top with a spatula.
07 - Sprinkle with almonds or walnuts and coarse sugar or brown sugar, if using.
08 - Bake for 35-40 minutes, or until the center is set and the top is golden brown.
09 - Allow to cool for 10 minutes before slicing. Serve warm or at room temperature.