Preheat your oven to 375°F and lightly grease a small oven-safe baking dish with a tiny bit of olive oil.
Heat the teaspoon of olive oil in a skillet over medium heat, then add the ground turkey sausage.
Cook the sausage while breaking it into small crumbles until it is browned and fully cooked through.
Add the diced onions and red bell peppers to the skillet, sautéing for about 4 minutes until they become tender and fragrant.
Stir in the fresh baby spinach and toss for 1 minute until it is just wilted, then remove the skillet from the heat.
In a medium mixing bowl, whisk together the whole eggs, egg whites, nutritional yeast, sea salt, black pepper, and garlic powder until well combined.
Spread the cooked sausage and vegetable mixture evenly across the bottom of your prepared baking dish.
Pour the egg mixture over the sausage and vegetables, ensuring everything is evenly distributed.
Bake for 20 to 25 minutes, or until the eggs are completely set in the center and the edges are slightly golden brown.
Let the bake cool for 5 minutes before slicing and serving warm.