Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper for easy cleanup.
In a small shallow bowl, whisk the egg until smooth. In a second shallow bowl, combine the almond flour, 1 tablespoon of grated parmesan, dried oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the egg wash, allowing any excess to drip off, then press firmly into the almond flour mixture until both sides are thoroughly coated.
Place the breaded chicken on the prepared baking sheet, drizzle with olive oil, and bake for 15-18 minutes until the crust is golden and the internal temperature reaches 165°F.
While the chicken is baking, warm the marinara sauce in a small saucepan over medium-low heat. In a separate skillet, lightly sauté the zucchini noodles for 2-3 minutes until just tender but not mushy.
To serve, place the zucchini noodles on a plate, top with the crispy chicken, spoon the warm marinara sauce over the center, and garnish with the remaining tablespoon of parmesan cheese.