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 smooth.
In a separate shallow dish, combine the almond flour, parmesan cheese, dried oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the egg wash, coating both sides, then dredge it through the parmesan mixture, pressing firmly to adhere.
Heat the olive oil in a 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 chicken is cooked through.
While the chicken cooks, warm the marinara sauce in a small saucepan over low heat.
In another skillet, lightly sauté the zucchini noodles for 2 minutes until just tender but still crisp.
Plate the zucchini noodles, top with the warm marinara sauce, and place the crispy parmesan chicken on top.