Finely mince the red onion and roughly chop the fresh dill for maximum flavor release.
In a medium glass bowl, whisk together the whole eggs, liquid egg whites, sea salt, and black pepper until the mixture is uniform and slightly frothy.
Heat the ghee in a high-quality non-stick skillet over medium-low heat until shimmering.
Add the minced red onion and baby spinach to the skillet, sautéing for about 2 minutes until the spinach is just wilted and the onion is translucent.
Pour the whisked egg mixture into the skillet and let it sit undisturbed for 30 seconds before gently folding from the edges with a silicone spatula.
When the eggs are 80% set, fold in the smoked salmon pieces and lemon zest, ensuring the salmon is warmed through but not overcooked.
Remove the skillet from the heat while the eggs still look slightly wet to ensure a creamy, delicate texture.
Transfer the scramble to a plate, drizzle with the zesty kefir, and finish with a generous sprinkle of fresh dill.