Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with paper towels and slice it into even cutlets to ensure uniform cooking.
In a shallow bowl, whisk the large egg until smooth.
In a separate shallow bowl, combine the almond flour, panko breadcrumbs, parmesan cheese, garlic powder, oregano, sea salt, and black pepper.
Dip each chicken cutlet into the whisked egg, allowing any excess to drip off, then press firmly into the breading mixture until fully coated.
Place the breaded chicken on the prepared baking sheet and lightly mist the tops with avocado oil.
Bake for 15-18 minutes, flipping the chicken halfway through, until the coating is golden-brown and the chicken is cooked through.
Remove from the oven and spoon the marinara sauce over the center of each chicken cutlet, then sprinkle with shredded mozzarella cheese.
Return the chicken to the oven for 3-5 minutes, or until the cheese is melted and bubbling.
While the cheese melts, quickly sauté the zucchini noodles in a pan over medium heat for 2 minutes until just tender.
Serve the crispy chicken parmesan immediately over the bed of zucchini noodles.