Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Dice the red bell pepper and zucchini into small, uniform cubes.
Toss the diced vegetables on the baking sheet with olive oil, sea salt, black pepper, and garlic powder.
Roast the vegetables for 12-15 minutes until they are tender and slightly caramelized around the edges.
While the vegetables roast, whisk together the whole eggs and egg whites in a medium bowl until well combined and frothy.
Heat a non-stick skillet over medium-low heat and pour in the egg mixture, stirring gently with a silicone spatula to create soft curds.
When the eggs are nearly set, fold in the roasted vegetables and fresh baby spinach, stirring until the greens are just wilted.
Remove from heat, top with crumbled feta cheese, and serve immediately.