Preheat your oven to 375°F (190°C) and lightly grease a small oven-safe baking dish with a touch of olive oil.
Heat the extra virgin olive oil in a skillet over medium heat, then add the diced yellow onion and red bell pepper.
Sauté the vegetables for 4-5 minutes until the onion is translucent and the peppers are tender.
Add the ground turkey sausage to the skillet, breaking it up with a wooden spoon, and cook until browned and no longer pink.
Stir in the fresh spinach and cook for 1 minute until just wilted, then remove the skillet from the heat.
In a medium mixing bowl, whisk together the large eggs, egg whites, sea salt, black pepper, and garlic powder until well combined.
Transfer the sausage and vegetable mixture into the prepared baking dish, spreading it out into an even layer.
Pour the egg mixture over the top, ensuring it settles into all the crevices.
Place the dish in the oven and bake for 20-25 minutes, or until the eggs are set and the top is lightly golden.
Let the bake rest for 5 minutes before slicing and serving.