Preheat your oven to 400°F and line a baking sheet with parchment paper.
Place the chicken breast between two sheets of plastic wrap and pound to an even half-inch thickness.
In a shallow bowl, whisk the half egg. In a separate shallow bowl, combine the almond flour, grated parmesan, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, allowing any excess to drip off, then dredge it through the almond flour mixture, pressing firmly to ensure an even coating.
Place the coated chicken on the prepared baking sheet, drizzle with olive oil, and bake for 15 minutes.
Remove the chicken from the oven, spoon the marinara sauce over the top, and sprinkle with the shredded mozzarella.
Return to the oven for 5-7 minutes, or until the cheese is melted and bubbly.
While the chicken finishes, lightly sauté the zucchini noodles in a non-stick pan for 2 minutes until just tender.
Serve the crispy chicken parmesan immediately over the bed of zucchini noodles.