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. In a second shallow bowl, combine the almond flour, parmesan cheese, sea salt, black pepper, garlic powder, and dried oregano.
Dip the chicken breast into the egg wash, then dredge in the parmesan mixture, pressing firmly to ensure an even coating.
Heat the olive oil in a non-stick skillet over medium heat. Add the chicken and cook for 5-6 minutes per side until golden brown and cooked through.
While the chicken cooks, spiralize the zucchini into noodles and lightly sauté in a separate pan for 2-3 minutes until just tender.
Warm the marinara sauce in a small saucepan or microwave.
Plate the zucchini noodles, top with the crispy chicken breast, and finish with the warm marinara sauce poured over the center.