Preheat oven to 375°F (190°C) and grease a 9x13 inch baking dish with non-stick spray or olive oil.

Heat olive oil in a skillet over medium heat and sauté bell peppers, red onion, and broccoli for 5 minutes until slightly softened.

In a large mixing bowl, whisk together the eggs, cottage cheese, salt, black pepper, and garlic powder until the mixture is uniform.

Fold the sautéed vegetables and chopped baby spinach into the egg mixture.

Pour the combined mixture into the prepared baking dish, ensuring vegetables are evenly distributed.

Sprinkle the shredded sharp cheddar cheese over the surface.

Bake in the preheated oven for 35 to 40 minutes, or until the center is firm to the touch and the edges are golden brown.

Remove from oven and allow to rest for 5 minutes to set before slicing into 6 portions.