Wash and dice the Yukon gold potato into small 1/2-inch cubes to ensure even cooking.
Heat the avocado oil in a large non-stick skillet over medium heat until shimmering.
Add the diced potatoes to the skillet and cook for 8-10 minutes, stirring occasionally, until they are golden-brown and fork-tender.
Slice the chicken sausage into rounds and add them to the skillet along with the diced bell pepper and red onion.
Sauté the mixture for another 5 minutes until the sausage is browned and the vegetables have softened.
In a small bowl, whisk together the large eggs, egg whites, sea salt, black pepper, and garlic powder until well combined.
Lower the heat to medium-low and pour the egg mixture directly over the sausage and potato base.
Gently scramble the eggs using a spatula, folding them into the other ingredients until just set and fluffy.
Remove from heat and garnish with chopped fresh parsley before serving warm.