Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Place the chicken breast between two sheets of parchment paper and pound with a meat mallet to an even half-inch thickness.
In a shallow bowl, whisk the egg white until slightly frothy.
In a separate shallow bowl, combine the almond flour, nutritional yeast, dried oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the egg white to coat, then dredge it through the almond flour mixture, pressing firmly to ensure the crust adheres.
Heat the avocado oil in a non-stick skillet over medium-high heat and sear the chicken for 2-3 minutes per side until the coating is golden and crisp.
Transfer the seared chicken to the prepared baking sheet, top with the marinara sauce and mozzarella cheese, and bake for 10-12 minutes until the cheese is bubbly.
While the chicken bakes, spiralize the zucchini into noodles and lightly sauté them in the same skillet used for the chicken for 2 minutes until just tender.
Plate the zucchini noodles and top with the crispy chicken parmesan to serve.