Preheat your oven to 400°F and lightly grease a rimmed baking sheet with half of the olive oil.
Butterfly the chicken breast and pound it to an even half-inch thickness for uniform cooking.
In a shallow bowl, whisk the egg until smooth. In a separate shallow dish, combine almond flour, parmesan, sea salt, black pepper, garlic powder, and oregano.
Dip the chicken into the egg wash, letting any excess drip off, then press firmly into the almond flour mixture until fully coated.
Place the chicken on the prepared baking sheet and bake for 15 minutes.
Remove from the oven, spoon the marinara sauce over the chicken, and sprinkle with shredded mozzarella.
Return to the oven for 5-7 minutes, or until the cheese is melted and bubbly.
While the chicken finishes, sauté the zucchini noodles in a pan with the remaining olive oil for 2-3 minutes until just tender.
Serve the crispy chicken parmesan over the bed of zucchini noodles and enjoy immediately.