Preheat your oven to 400°F (200°C) and lightly grease a rimmed baking sheet with the olive oil.
Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness.
Season both sides of the chicken with the sea salt and black pepper.
In a shallow bowl, whisk the egg until smooth. In a second shallow bowl, combine the almond flour, parmesan cheese, oregano, and garlic powder.
Dip the chicken breast into the egg wash, allowing any excess to drip off, then dredge it in the almond flour mixture, pressing firmly to ensure a thick coating.
Place the coated chicken on the prepared baking sheet and bake for 15 minutes.
Remove the tray from the oven. Spoon the marinara sauce over the center of the chicken and sprinkle with the shredded mozzarella.
Return to the oven for an additional 5-7 minutes, or until the cheese is melted and bubbly and the chicken reaches an internal temperature of 165°F.
While the chicken finishes, quickly sauté the zucchini noodles in a separate pan for 2-3 minutes until just tender.
Serve the crispy chicken parmesan immediately over the bed of zucchini noodles.