Preheat your oven to 400°F and line a large rimmed sheet pan with parchment paper for easy cleanup.
Place the ground turkey, diced bell peppers, and red onion on the sheet pan, then drizzle with olive oil and sprinkle with sea salt, black pepper, and garlic powder.
Toss the ingredients directly on the pan to coat evenly, then spread them out in a single layer.
Roast in the oven for 12 minutes until the turkey is cooked through and the vegetables are tender and slightly charred.
While the vegetables roast, whisk together the whole eggs and liquid egg whites in a medium bowl until well combined.
Remove the pan from the oven and pour the egg mixture evenly over the roasted turkey and vegetables.
Return the pan to the oven and bake for 8 to 10 minutes, or until the eggs are completely set and fluffy.
Remove from the oven, top with fresh chopped baby spinach, and slice into portions to serve.