Preheat your oven to 375°F (190°C) and lightly grease a small oven-safe baking dish.
Heat the avocado oil in a skillet over medium-high heat.
Add the ground turkey sausage, diced onion, and red bell pepper to the skillet.
Cook until the sausage is browned and the vegetables are tender, breaking the meat into small crumbles.
Stir in the fresh baby spinach until just wilted, then remove the skillet from the heat.
In a small bowl, whisk the eggs with sea salt, black pepper, and garlic powder until well combined.
Transfer the sausage and vegetable mixture into the prepared baking dish.
Pour the whisked egg mixture over the top, ensuring it settles into all the crevices.
Sprinkle the shredded sharp cheddar cheese evenly over the surface.
Bake for 15-20 minutes or until the eggs are set and the cheese is golden and bubbly.