Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness for uniform cooking.
In a shallow bowl, whisk the egg white until slightly frothy.
In a second shallow bowl, combine the grated parmesan cheese, almond flour, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken into the egg white, then dredge in the parmesan mixture, pressing firmly to ensure a thick, even coating.
Heat the extra virgin olive oil in a large non-stick skillet over medium heat.
Add the chicken to the skillet and cook for 5-6 minutes per side until the crust is golden brown and the internal temperature reaches 165°F.
While the chicken cooks, warm the marinara sauce in a small saucepan over low heat.
Remove the chicken from the skillet and let it rest; in the same skillet, sauté the spiralized zucchini for 2 minutes until just tender but still vibrant.
Plate the zucchini noodles, top with the crispy chicken breast, and ladle the warm marinara sauce over the center.
Garnish with chopped fresh parsley before serving.