Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
In a shallow bowl, whisk the egg white until it becomes slightly frothy.
In a separate shallow dish, combine the almond flour, parmesan cheese, dried oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the egg white, ensuring it is fully moistened, then dredge it through the almond flour mixture until evenly coated.
Place the breaded chicken on the prepared baking sheet and drizzle the olive oil evenly over the top.
Bake for 18 minutes until the crust is golden and the chicken is cooked through to an internal temperature of 165°F.
Spoon the marinara sauce over the chicken and sprinkle with the mozzarella cheese, then broil for 2-3 minutes until the cheese is bubbly.
While the cheese melts, briefly sauté the zucchini noodles in a non-stick pan over medium heat for 2 minutes and serve the chicken directly on top.