Butterfly the chicken breast to ensure even thickness and season both sides with sea salt, black pepper, and garlic powder.
In a shallow bowl, whisk the egg white until it becomes slightly frothy.
In a separate shallow dish, combine the almond flour, grated parmesan cheese, and dried oregano.
Dip the seasoned chicken breast into the egg white, then dredge it through the parmesan mixture, pressing firmly to ensure the crust adheres.
Heat the olive oil in a non-stick skillet over medium heat.
Place the chicken in the skillet and sear for 5-6 minutes per side, or until the crust is golden brown and the chicken is cooked through.
While the chicken rests, spiralize the zucchini into noodles and lightly sauté them in the same skillet for 2-3 minutes until just tender.
Warm the marinara sauce in a small saucepan or microwave-safe bowl.
Plate the zucchini noodles, top with the crispy chicken breast, and finish by spooning the warm marinara sauce over the top.