Preheat your oven to 400°F and line a small baking sheet with parchment paper for easy cleanup.
Place the diced zucchini, red bell pepper, and red onion on the sheet; drizzle with olive oil and sprinkle with salt, pepper, and garlic powder.
Toss the vegetables to coat evenly and roast for 15 minutes until they are tender and have developed a light golden char.
While the vegetables roast, whisk the whole eggs and liquid egg whites in a medium bowl until well combined and slightly frothy.
Warm a non-stick skillet over medium-low heat and add the rinsed black beans, stirring for 1-2 minutes until heated through.
Pour the egg mixture into the skillet with the beans and cook, stirring slowly with a silicone spatula to create soft, pillowy curds.
Once the eggs are just set, remove from heat to prevent overcooking and keep the texture creamy.
Spoon the roasted vegetables onto a plate, top with the egg and bean scramble, and finish with a sprinkle of crumbled feta and fresh parsley.