Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Place the chicken breast between two pieces of plastic wrap and pound to an even half-inch thickness.
In a shallow bowl, whisk the egg. In a second shallow bowl, combine the almond flour, parmesan cheese, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken into the egg wash, then dredge in the almond flour mixture, pressing firmly to ensure an even coating.
Place the chicken on the prepared baking sheet and lightly mist with olive oil.
Bake for 15-18 minutes, flipping halfway through, until the coating is golden and the chicken is cooked through.
Spoon the marinara sauce over the chicken and top with the mozzarella cheese; return to the oven for 2-3 minutes until the cheese is melted and bubbly.
While the cheese melts, lightly sauté the zucchini noodles in a pan with the remaining olive oil for 2 minutes until just tender.
Serve the crispy chicken over the bed of zucchini noodles and enjoy immediately.