Clean and thinly slice the cremini mushrooms, then finely mince the fresh chives and parsley.
In a medium bowl, whisk together the whole eggs, liquid egg whites, sea salt, black pepper, and garlic powder until the mixture is well combined and slightly frothy.
Heat the extra virgin olive oil in a non-stick skillet over medium heat.
Add the sliced mushrooms to the skillet and sauté for 5-6 minutes until they are golden brown and their moisture has evaporated.
Pour the egg mixture directly over the sautéed mushrooms in the skillet.
Let the eggs sit for about 30 seconds to set the bottom, then use a spatula to gently lift the edges, allowing the raw egg to flow underneath.
When the eggs are mostly set but still slightly moist on top, sprinkle the fresh chives and parsley over one half of the omelet.
Carefully fold the omelet in half over the herbs and cook for another 30 seconds to finish.
Slide the omelet onto a plate and serve immediately while hot.