Preheat your oven to 400°F (200°C) and lightly grease a small baking dish with a touch of olive oil.
Dice the bell peppers, zucchini, and red onion into small, uniform pieces and thinly slice the chicken sausage.
Spread the vegetables and sausage onto a parchment-lined baking sheet, drizzle with olive oil, and season with sea salt, black pepper, and garlic powder.
Roast the vegetable mixture for 15 minutes until the edges are slightly caramelized and tender.
While the vegetables roast, whisk together the large eggs and liquid egg whites in a medium bowl until well combined.
Remove the vegetables from the oven and transfer them into the prepared baking dish, spreading them into an even layer.
Pour the egg mixture over the roasted vegetables and sausage, ensuring everything is submerged.
Return the dish to the oven and bake for 15 to 20 minutes, or until the eggs are completely set in the center.
Garnish with freshly chopped parsley and serve immediately.