Heat the oven to 350 degrees F. Line a square 9×9 inch baking pan with parchment paper, leaving some hanging over the sides for easier removal.
Heat some oil in a skillet over medium heat. Add the peppers and spinach and cook for 4-5 minutes until softened. Evenly distribute in the bottom of the lined pan along with the green onions.
In the same frying pan, cook the turkey sausage for 3-4 minutes until browned, breaking up with a wooden spoon. Set aside.
In a blender, combine the eggs, cottage cheese, flour, garlic powder, and salt until smooth. Add the cheddar cheese and pulse a few times to distribute.
Transfer the egg mixture to your prepared baking dish and sprinkle the top evenly with cooked crumbled sausage. Carefully stir the mixture with a spoon to distribute the vegetables. Bake for 35-40 minutes, or until the center is set.
Allow to cool for about 15-20 minutes, then slice into squares. Serve or store in the fridge for later. Enjoy!