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 bowl, combine the almond flour, grated parmesan cheese, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken breast into the egg white, ensuring it is fully coated, then dredge it in the almond flour mixture, pressing firmly to adhere the crust.
Place the breaded chicken on the prepared baking sheet and bake for 15-18 minutes until the crust is golden brown and the internal temperature reaches 165°F.
While the chicken is baking, heat the olive oil in a large skillet over medium heat and sauté the zucchini noodles for 2-3 minutes until just tender.
Warm the marinara sauce in a small saucepan over low heat until simmering.
Plate the zucchini noodles, top with the crispy baked chicken, and finish with a generous pour of the zesty marinara sauce.