Preheat your oven to 375°F (190°C). Grease a baking dish with butter or non-stick spray.
In a large bowl, whisk together the eggs, cottage cheese, shredded cheese, milk, baking powder, salt, pepper, and garlic powder.
Stir in the bell peppers, spinach, and crumbled bacon or sausage. Mix until everything is evenly distributed.
Pour the mixture into the prepared baking dish and bake for 30 minutes, or until the eggs are set and the top is slightly golden. Let it cool for a few minutes before slicing and serving.