Slice the chicken apple sausage into 1/4-inch thick rounds.
Heat the avocado oil in a large non-stick skillet over medium heat.
Add the sliced sausage, diced red bell pepper, and yellow onion to the skillet.
Sauté for 5-6 minutes, stirring occasionally, until the vegetables are tender and the sausage is browned and caramelized.
In a small bowl, whisk together the whole eggs, liquid egg whites, sea salt, black pepper, and garlic powder until well combined.
Lower the skillet heat to medium-low and pour the egg mixture over the sausage and vegetables.
Gently fold the eggs with a spatula, scraping the bottom of the pan to create soft curds.
When the eggs are nearly set, add the baby spinach and continue to fold for 1 minute until the spinach is wilted.
Remove from heat and serve immediately while the skillet is hot and steaming.