Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper for easy cleanup.
In a shallow bowl, whisk the egg until smooth to create the binding wash for the crust.
In a separate shallow dish, combine the almond flour, parmesan cheese, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, ensuring all sides are coated, then press firmly into the almond flour mixture until evenly breaded.
Place the breaded chicken on the prepared baking sheet and bake for 15-18 minutes until the chicken is cooked through and the coating is golden.
Spoon the marinara sauce over the center of the chicken and top with the shredded mozzarella cheese.
Return the chicken to the oven for an additional 3-5 minutes until the cheese is melted and bubbling.
While the cheese melts, heat the olive oil in a skillet over medium heat and sauté the zucchini noodles for 2-3 minutes until just tender.
Serve the crispy chicken parmesan immediately over the bed of warm zucchini noodles.