Preheat your oven to 425°F and line a baking sheet with parchment paper for easy cleanup.
Season the chicken breast with sea salt, black pepper, and garlic powder on both sides.
In a shallow bowl, whisk the egg until smooth; in a second bowl, combine the panko and dried oregano.
Dip the chicken into the egg wash, then press firmly into the panko mixture until evenly coated.
Place the chicken on the prepared baking sheet, drizzle with olive oil, and bake for 15 minutes.
Spoon the marinara sauce over the chicken and top with the mozzarella cheese.
Return to the oven for 5 minutes until the cheese is bubbly and the chicken is cooked through.
Serve the crispy chicken over fresh zucchini noodles and garnish with the parmesan cheese.