Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness.
In a shallow bowl, whisk together the almond flour, parmesan cheese, garlic powder, dried oregano, sea salt, and black pepper.
Press the chicken breast into the almond flour mixture until both sides are thoroughly and evenly coated.
Heat the olive oil in a non-stick skillet over medium heat and add the chicken, cooking for 4 to 5 minutes per side until golden brown and cooked through.
While the chicken cooks, warm the marinara sauce in a small saucepan over low heat.
Remove the chicken from the skillet and set aside; in the same skillet, flash-sauté the zucchini noodles for 2 minutes until just tender.
Spread the warm marinara sauce onto a plate, top with the zucchini noodles, and place the crispy chicken on top to serve.