Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
In a shallow bowl, whisk the egg until smooth. In a second shallow bowl, combine the almond flour, grated parmesan cheese, garlic powder, dried oregano, sea salt, and black pepper.
Dredge the chicken breast in the egg wash, allowing any excess to drip off, then press firmly into the almond flour mixture until evenly coated on all sides.
Place the breaded chicken on the prepared baking sheet and bake for 15 minutes until the coating is golden and the chicken is nearly cooked through.
Remove from the oven and spoon the marinara sauce over the center of the chicken, then sprinkle with the part-skim mozzarella cheese.
Return the chicken to the oven and bake for an additional 5 minutes, or until the cheese is melted and bubbly.
While the chicken finishes, lightly steam or sauté the zucchini noodles until tender-crisp.
Serve the crispy chicken parmesan immediately over the bed of zucchini noodles.