Preheat your oven to 400°F and lightly coat a baking sheet with the olive oil.
Slice the chicken breast in half horizontally to create two thin cutlets of even thickness for faster, more even cooking.
In a shallow bowl, whisk the egg until the yolk and white are fully combined.
In a second shallow bowl, stir together the panko breadcrumbs, garlic powder, dried oregano, sea salt, and black pepper.
Dip each chicken cutlet into the egg wash, allowing any excess to drip off, then press firmly into the panko mixture until both sides are thoroughly coated.
Place the breaded chicken on the prepared baking sheet and bake for 12-15 minutes until the coating is crisp and the chicken is cooked through.
Remove the sheet from the oven and spoon the marinara sauce over each piece of chicken, then top evenly with the shredded mozzarella cheese.
Return the chicken to the oven for an additional 5 minutes, or until the cheese is melted and starting to bubble.
While the cheese melts, quickly sauté the zucchini noodles in a pan over medium heat for 2-3 minutes until just tender.
Serve the crispy chicken over the bed of zucchini noodles and garnish with the parmesan cheese.