Preheat oven to 400°F and line a baking sheet with parchment paper.
In a shallow bowl, whisk the egg. In another bowl, combine almond flour, parmesan, garlic powder, oregano, salt, and pepper.
Dip the chicken breast into the egg, then dredge in the almond flour mixture until fully coated.
Place chicken on the baking sheet, drizzle with olive oil, and bake for 15-20 minutes until golden and cooked through.
Top the chicken with marinara sauce and mozzarella cheese, then broil for 2-3 minutes until the cheese is bubbly and melted.
While the chicken rests, lightly sauté the zucchini noodles in a pan for 2 minutes until just tender.
Serve the crispy chicken over the zucchini noodles and enjoy immediately.