Preheat your oven to 400°F (200°C) 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 egg. In a second shallow bowl, combine the almond flour, parmesan cheese, oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the egg wash, letting any excess drip off, then press firmly into the almond flour mixture until fully coated.
Place the coated chicken on the prepared baking sheet and lightly drizzle or spray with olive oil.
Bake for 12-15 minutes until the coating is crisp and the chicken is nearly cooked through.
Remove from the oven, spoon the marinara sauce over the chicken, and top with the mozzarella cheese.
Return to the oven for another 3-5 minutes until the cheese is melted and bubbly.
While the chicken finishes, use a spiralizer to create zucchini noodles and quickly sauté them in a pan for 2 minutes until tender-crisp.
Serve the crispy chicken parmesan over the zucchini noodles immediately.