Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Dice the bell pepper, zucchini, and red onion into small, uniform pieces to ensure even roasting.
Place the vegetables on the baking sheet and toss with extra virgin olive oil, garlic powder, and half of the sea salt and black pepper.
Roast the vegetables for 15 to 20 minutes until they are tender and the edges are slightly caramelized.
While the vegetables roast, whisk the whole eggs, egg whites, Greek yogurt, and the remaining salt and pepper in a medium bowl until completely smooth.
Heat a large non-stick skillet over medium-low heat and pour in the egg mixture.
Using a silicone spatula, gently push the eggs from the edges to the center, creating soft, silky curds until just set.
Divide the roasted vegetables between plates, top with the scrambled eggs, and garnish with fresh avocado slices.