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

Whisk together the egg whites and whole eggs until uniform and pale yellow.

Stir in the cottage cheese and grated cheddar into the egg mixture until thoroughly mixed.

In a skillet, heat olive oil over medium heat, add red and green bell peppers, onion, and broccoli, and sauté for about 5 minutes.

Fold in the chopped spinach and cook until wilted, about 2 minutes.

Combine the sautéed vegetables with the egg and cheese blend and add garlic powder, salt, and black pepper, mixing well.

Pour the mixture into the prepared baking dish and spread it evenly with a spatula.

Bake for 30–35 minutes or until the center is set and the top is golden brown.

Let cool for a few minutes before slicing and serving warm.