Butterfly the chicken breast or pound it between parchment paper to an even half-inch thickness.
In a shallow bowl, whisk the egg until smooth.
In a separate shallow bowl, combine the almond flour, grated parmesan, 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 both sides are thoroughly coated.
Heat the olive oil in a large non-stick skillet over medium heat.
Place the chicken in the skillet and cook for 5 to 6 minutes per side until the crust is golden brown and the internal temperature reaches 165 degrees.
While the chicken cooks, warm the marinara sauce in a small saucepan over low heat.
In a separate pan, flash-sauté the zucchini noodles for 2 minutes until just tender, then drain any excess moisture.
Place the zucchini noodles on a plate, top with the crispy chicken breast, and ladle the warm marinara sauce over the center.