Preheat your oven to 375°F (190°C).
Place the shredded russet potato in a clean kitchen towel and squeeze firmly to remove as much moisture as possible.
In a medium mixing bowl, whisk together the large eggs, egg whites, Greek yogurt, sea salt, black pepper, and garlic powder until the mixture is smooth and well combined.
Heat the ghee in an 8-inch oven-safe non-stick skillet over medium heat.
Add the shredded potatoes to the skillet, pressing them down into an even layer to form a crust, and cook for 6 minutes until the bottom is golden and crispy.
Stir the fresh baby spinach into the egg mixture and pour it carefully over the potato base in the skillet.
Transfer the skillet to the preheated oven and bake for 12-15 minutes, or until the eggs are set in the center and slightly puffed.
Garnish with freshly chopped chives, slice into wedges, and serve immediately.