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.
In a shallow bowl, whisk the egg white until frothy. In a second bowl, combine panko, parmesan, garlic powder, oregano, salt, and pepper.
Dip the chicken into the egg white, then press into the breadcrumb mixture until fully coated.
Place the chicken on the baking sheet and lightly spray or drizzle with half the olive oil.
Bake for 15-18 minutes until the coating is golden and the chicken is cooked through.
Remove from the oven, spoon the marinara sauce over the chicken, and top with the mozzarella cheese.
Return to the oven under the broiler for 2-3 minutes until the cheese is bubbly and slightly browned.
While the cheese melts, sauté the zucchini noodles in a pan with the remaining olive oil for 2 minutes until just tender.
Serve the crispy chicken over the zucchini noodles and enjoy immediately.