Preheat your oven to 400°F and line a baking sheet with parchment paper.
In a shallow dish, whisk the egg until smooth.
In a separate shallow dish, combine the almond flour, parmesan cheese, dried oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the egg wash, then dredge it through the almond flour mixture, pressing firmly to ensure an even coating.
Place the chicken on the prepared baking sheet and bake for 15 minutes.
Remove from the oven, top the chicken with marinara sauce and mozzarella cheese, then return to the oven for 5-7 minutes until the cheese is bubbly.
While the chicken finishes, spiralize the zucchini and sauté it in a pan with olive oil for 2-3 minutes until just tender.
Serve the crispy chicken over the zucchini noodles and enjoy immediately.