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 pieces.
Toss the vegetables on the baking sheet with olive oil, half of the sea salt, and half of the black pepper.
Roast the vegetables for 12 to 15 minutes until they are tender and slightly browned at the edges.
While the vegetables roast, whisk together the eggs, egg whites, Greek yogurt, nutritional yeast, and remaining salt and pepper in a medium bowl until no streaks of yogurt remain.
Slice the chicken sausage into thin rounds and heat a non-stick skillet over medium heat.
Add the sausage to the skillet and sear for 2 to 3 minutes until golden brown.
Lower the heat to medium-low and pour the egg mixture into the skillet with the sausage.
Let the eggs sit for 30 seconds, then use a silicone spatula to gently push the eggs from the edges toward the center.
Fold in the roasted vegetables once the eggs are mostly set but still look moist.
Remove from heat immediately to prevent overcooking and garnish with chopped fresh chives before serving.