Preheat your oven to 400°F and line a small baking sheet with parchment paper.
In a shallow bowl, whisk together the almond flour, parmesan cheese, dried oregano, garlic powder, sea salt, and black pepper.
Brush the chicken breast evenly with the olive oil, then dredge it in the almond flour mixture, pressing firmly to ensure the crust adheres to both sides.
Place the coated chicken on the prepared baking sheet and bake for 15-18 minutes until the chicken is cooked through and the coating is golden.
Remove the pan from the oven, spoon the marinara sauce over the chicken, and top with the mozzarella cheese.
Set the oven to broil and return the chicken to the top rack for 2-3 minutes until the cheese is bubbly and slightly browned.
While the chicken rests, lightly sauté the zucchini noodles in a non-stick pan for 2 minutes until just tender, then serve the chicken parmesan over the noodles.