Preheat your oven to 400°F (200°C) and lightly coat a baking sheet with the olive oil.
Season the chicken breast evenly on both sides with the sea salt, black pepper, garlic powder, and dried oregano.
In a small shallow bowl, whisk the egg until smooth. In a second shallow bowl, combine the almond flour and parmesan cheese.
Dip the seasoned chicken breast into the egg wash, allowing any excess to drip off, then press firmly into the almond-parmesan mixture until fully coated.
Place the coated chicken on the prepared baking sheet and bake for 15-18 minutes until the crust is golden brown and the chicken is cooked through.
Remove from the oven, spoon the marinara sauce over the center of the chicken, and top with the mozzarella cheese.
Switch the oven to broil and place the chicken back in for 2-3 minutes until the cheese is melted and bubbly.
While the cheese melts, flash-sauté the zucchini noodles in a non-stick pan for 1-2 minutes until just tender, then serve the chicken parmesan over the noodles.