Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a shallow bowl, lightly whisk the egg white until frothy.
In a separate shallow dish, combine the almond flour, grated parmesan, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken breast into the egg white, then dredge it in the almond flour mixture, pressing firmly so the coating sticks to all sides.
Place the coated chicken on the prepared baking sheet and lightly drizzle with half of the olive oil.
Bake for 15-18 minutes, or until the chicken is cooked through and the crust is golden.
Remove from the oven, spoon the marinara sauce over the chicken, and top with the shredded mozzarella.
Return to the oven and broil for 2-3 minutes until the cheese is bubbly and slightly browned.
While the chicken rests, sauté the zucchini noodles in the remaining olive oil over medium heat for 2 minutes until just tender.
Serve the baked chicken parmesan immediately over the bed of zucchini noodles.