Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Dice the red bell pepper and red onion into bite-sized pieces, then toss them on the baking sheet with the olive oil.
Roast the vegetables for 12 to 15 minutes until they are tender and slightly caramelized at the edges.
While the vegetables roast, slice the chicken apple sausage into thin rounds and whisk the eggs, egg whites, sea salt, and black pepper together in a medium bowl.
Place a non-stick skillet over medium heat and sear the sausage rounds for 2 minutes per side until golden brown.
Add the roasted vegetables and baby spinach to the skillet, stirring for 1 minute until the spinach begins to wilt.
Reduce the heat to medium-low and pour the egg mixture into the skillet.
Use a silicone spatula to gently push the eggs from the edges toward the center, creating soft curds until the eggs are just set.
Remove from heat immediately, garnish with freshly chopped chives, and serve warm.