Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Toss the diced bell peppers, zucchini, and red onion on the baking sheet with 0.5 tablespoon of olive oil, dried oregano, and a pinch of salt and pepper.
Roast the vegetables for 15-20 minutes until they are tender and slightly caramelized around the edges.
While the vegetables roast, whisk the whole eggs and liquid egg whites together in a medium bowl until well combined and frothy.
Heat the remaining 0.5 tablespoon of olive oil in a non-stick skillet over medium-low heat.
Pour the egg mixture into the skillet and let it sit for a few seconds until the edges begin to set.
Gently push the eggs across the pan with a spatula, creating large, soft curds until they are just cooked through but still moist.
Remove the eggs from the heat and gently fold in the roasted vegetables.
Season with the remaining sea salt and black pepper, then garnish with fresh chopped parsley before serving hot.