Preheat the oven to 350 degrees Fahrenheit (175 degrees Celsius) and lightly grease an 8x8 or 9x9 inch baking dish with non-stick spray.
In a large mixing bowl, whisk the eggs until well combined and frothy.
Fold in the cottage cheese, shredded cheddar, chopped spinach, diced bell peppers, and onions until evenly distributed.
Add the salt, black pepper, and garlic powder to the mixture and stir well.
Pour the egg mixture into the prepared baking dish, spreading the vegetables evenly with a spatula.
Bake in the center rack of the oven for 30 to 35 minutes, or until the center is set and the edges are lightly golden brown.
Remove from the oven and allow the dish to rest for 5 minutes before slicing into 6 squares.