Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Place the chicken breast between two sheets of plastic wrap and pound to an even half-inch thickness, then season both sides with sea salt and black pepper.
In a shallow bowl, whisk the egg until smooth; in a second shallow bowl, combine the almond flour, parmesan cheese, dried oregano, and garlic powder.
Dip the chicken breast into the egg wash, allowing any excess to drip off, then press firmly into the almond flour mixture until thoroughly coated on all sides.
Place the coated chicken on the prepared baking sheet, drizzle with extra virgin olive oil, and bake for 15 to 18 minutes until the internal temperature reaches 165°F.
Remove the tray from the oven, spoon the marinara sauce over the center of the chicken, and sprinkle with the mozzarella cheese.
Switch the oven to broil and return the chicken to the top rack for 2 to 3 minutes until the cheese is bubbly and slightly browned.
While the cheese melts, quickly sauté the zucchini noodles in a non-stick pan over medium heat for 2 minutes until just tender, then serve the crispy chicken directly on top.