Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness.
In a shallow bowl, whisk the half egg. In a second bowl, combine the almond flour, grated parmesan, garlic powder, oregano, salt, and pepper.
Dip the chicken into the egg wash, then dredge in the parmesan mixture, pressing firmly to ensure the crust adheres.
Heat the olive oil in a non-stick skillet over medium heat. Add the chicken and cook for 5-6 minutes per side until the crust is golden brown and the internal temperature reaches 165°F.
While the chicken cooks, spiralize the zucchini into noodles. In a separate small pan, warm the marinara sauce over low heat.
Remove the chicken from the skillet. Add the zucchini noodles to the same skillet and sauté for 2 minutes until just tender.
Spread the warm marinara on a plate, top with the zucchini noodles, and place the crispy chicken on top.