Place the chicken breast between two sheets of parchment paper and pound to an even 1/2-inch thickness.
In a shallow bowl, whisk the egg until smooth.
In a second shallow bowl, combine the almond flour, parmesan cheese, dried oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the egg wash, then dredge in the almond-parmesan mixture, pressing firmly to ensure the coating adheres.
Heat the olive oil in a skillet over medium heat and cook the chicken for 5-6 minutes per side until the crust is golden and the center is cooked through.
While the chicken cooks, spiralize the zucchini into noodles and warm the marinara sauce in a small saucepan over low heat.
Briefly sauté the zucchini noodles in the same skillet for 2 minutes until just tender, then serve the crispy chicken on top with the warm marinara sauce.