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 thickness of about half an inch.
In a shallow bowl, whisk the egg. In a second shallow bowl, combine the panko breadcrumbs, parmesan, oregano, garlic powder, sea salt, and black pepper.
Dip the chicken into the egg wash, then press firmly into the panko mixture until fully and evenly coated.
Place the chicken on the prepared baking sheet and lightly mist with olive oil spray or drizzle with half the olive oil.
Bake for 12-15 minutes until the crust 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 3-5 minutes, or until the cheese is melted and bubbly.
While the chicken finishes, sauté the zucchini noodles in a pan with the remaining olive oil for 2-3 minutes until just tender.
Serve the crispy chicken parmesan over the bed of zucchini noodles.