Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Dice the red bell pepper, zucchini, and red onion into small, uniform half-inch pieces to ensure even roasting.
Toss the vegetables on the baking sheet with the olive oil and half of the sea salt, black pepper, and garlic powder.
Roast the vegetables for 18 to 20 minutes, tossing halfway through, until they are tender and slightly caramelized at the edges.
While the vegetables roast, whisk together the eggs, egg whites, Greek yogurt, and the remaining seasonings in a medium bowl until the mixture is light and completely smooth.
Heat a large non-stick skillet over medium-low heat and add the ghee, swirling the pan to coat the surface evenly.
Pour the egg mixture into the skillet and let it cook undisturbed for 30 seconds, then use a silicone spatula to gently push the curds from the outer edges toward the center.
When the eggs are soft and nearly set, fold in the roasted vegetables and remove the pan from the heat immediately to maintain a creamy texture.
Divide the scramble into bowls and serve warm, optionally garnished with fresh herbs.