Preheat oven to 400°F and line a baking sheet with parchment paper.
Place diced red bell peppers and red onions on the sheet, drizzle with avocado oil, and sprinkle with sea salt and black pepper.
Roast the vegetables for 15 minutes until they are tender and the edges are slightly charred.
While vegetables roast, whisk together the large eggs and egg whites in a medium bowl until well combined.
Heat a large non-stick skillet over medium heat and add the sliced chicken apple sausage, browning for 3-4 minutes.
Transfer the roasted vegetables from the oven directly into the skillet with the sausage.
Pour the egg mixture into the skillet, letting it sit for 30 seconds before gently folding with a spatula.
Continue to cook the eggs over medium-low heat until they are fluffy and just set.
Stir in the baby spinach during the last minute of cooking until it is just wilted.
Remove from heat and garnish with fresh chopped chives before serving.