Preheat your oven to 375°F 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 and sauté the diced yellow onion and red bell pepper until they are tender and fragrant.
Add the ground turkey sausage to the skillet, breaking it into small crumbles with a spatula, and cook until no longer pink.
Stir in the fresh baby spinach and cook for 1 minute until just wilted, then remove the skillet from the heat.
In a medium mixing bowl, whisk together the eggs, egg whites, sea salt, black pepper, and garlic powder until well combined.
Spread the sausage and vegetable mixture evenly across the bottom of the prepared baking dish.
Pour the egg mixture over the sausage and vegetables, ensuring the liquid fills all the gaps.
Place the dish in the oven and bake for 20 to 25 minutes, or until the center is firm and the top is lightly golden.