Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Place the chicken breast between two pieces 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 panko, parmesan, garlic powder, oregano, salt, and pepper.
Dip the chicken into the egg wash, then press firmly into the breadcrumb mixture until fully coated on both sides.
Place the chicken on the prepared baking sheet and lightly spritz or drizzle with the olive oil to help it crisp.
Bake for 15-18 minutes until the internal temperature reaches 165°F.
Remove from the oven, spoon the marinara sauce over the chicken, and sprinkle with the mozzarella cheese.
Return to the oven for 2-3 minutes or until the cheese is melted and bubbly.
While the cheese melts, lightly sauté the zucchini noodles in a pan for 2 minutes until just tender.
Serve the crispy chicken parmesan over the bed of zucchini noodles.