In a medium bowl, whisk together the whole eggs, liquid egg whites, and Greek yogurt until the mixture is completely uniform and slightly frothy.
Finely mince the fresh chives and set aside.
Heat a non-stick skillet over medium-low heat and add the grass-fed ghee, swirling to coat the bottom of the pan as it melts.
Pour the egg mixture into the skillet and let it sit undisturbed for about 30 seconds until the edges just begin to set.
Using a silicone spatula, gently push the eggs from the outer edges toward the center, creating large, soft curds.
Continue folding the eggs slowly and gently, keeping the heat low to ensure they remain tender and do not brown.
When the eggs are about 80% cooked and still look slightly wet, sprinkle in the sea salt, black pepper, crumbled feta, and minced chives.
Remove the pan from the heat immediately; the residual heat will finish cooking the eggs to a perfect, silky consistency.
Plate the eggs immediately and serve while hot.