Preheat your oven to 350°F (175°C) and grease a 9-inch square baking dish with cooking spray or butter.
In a large bowl, whisk the eggs until well beaten.
Add the cottage cheese, rolled oats, maple syrup, vanilla extract, lemon zest, cinnamon, and salt to the beaten eggs. Mix until well combined.
Gently fold in 1 cup of the blueberries, being careful not to crush them.
Pour the mixture into your prepared baking dish and spread evenly.
Sprinkle the remaining ½ cup of blueberries on top.
Bake for 35-40 minutes, or until the edges are golden brown and the center is set but still slightly jiggly.
Remove from the oven and let cool for 5-10 minutes before serving.
Serve warm, at room temperature, or chilled based on preference. Store leftovers covered in the refrigerator for up to 4 days.