Preheat oven to 375°F and grease a small baking dish with a touch of oil.
In a skillet over medium heat, add olive oil and sauté diced onion and bell pepper until softened.
Add ground turkey to the skillet, breaking it up with a spatula, and season with garlic powder, smoked paprika, salt, and pepper until browned.
Stir in the baby spinach until just wilted, then remove the skillet from heat.
In a medium bowl, whisk together the whole eggs and egg whites until well combined.
Transfer the turkey and vegetable mixture into the prepared baking dish.
Pour the egg mixture over the turkey, ensuring it is evenly distributed throughout the dish.
Bake for 20-25 minutes or until the center is set and the edges are lightly golden.