Preheat your oven to 375°F and lightly grease a small oven-safe baking dish with the avocado oil.
Place a skillet over medium heat and add the ground turkey sausage, cooking until browned and crumbled.
Add the diced yellow onion and red bell pepper to the skillet, sautéing for 3 to 4 minutes until the vegetables are tender.
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 egg, liquid egg whites, sea salt, black pepper, garlic powder, and dried oregano.
Transfer the cooked sausage and vegetable mixture into the prepared baking dish, spreading it out into an even layer.
Pour the egg mixture over the sausage and vegetables, ensuring the liquid is distributed evenly throughout the dish.
Bake for 20 to 25 minutes, or until the eggs are fully set in the center and the edges are slightly golden brown.