Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
In a shallow bowl, whisk the egg until smooth. In a second shallow bowl, combine the almond flour, parmesan cheese, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, letting any excess drip off, then press it firmly into the almond flour mixture until it is evenly coated on all sides.
Place the breaded chicken on the prepared baking sheet and bake for 15-18 minutes, or until the crust is golden and the chicken reaches an internal temperature of 165°F.
Remove the chicken from the oven and spoon the marinara sauce over the top, then sprinkle with the shredded mozzarella cheese.
Return the chicken to the oven for an additional 3-5 minutes until the cheese is melted and bubbly.
While the cheese melts, use a spiralizer to create zucchini noodles. Sauté the noodles in a pan with olive oil over medium heat for 2-3 minutes until just tender.
Plate the zucchini noodles and top with the crispy chicken parmesan to serve immediately.