Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness.
In a shallow bowl, whisk the egg until well beaten.
In a second shallow bowl, combine the grated parmesan, almond flour, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, allowing excess to drip off, then press firmly into the parmesan mixture until evenly coated on both sides.
Heat the olive oil in a non-stick skillet over medium heat.
Place the chicken in the skillet and cook for 5-6 minutes per side, or 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.
In a separate pan, lightly sauté the zucchini noodles for 2 minutes until just tender but still firm.
Serve the crispy chicken over the zucchini noodles and top with the warm marinara sauce.