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 separate shallow dish, combine the almond flour, grated Parmesan, garlic powder, oregano, salt, and pepper.
Dredge the chicken breast into the egg wash, then press firmly into the Parmesan mixture until both sides are thoroughly coated.
Heat the olive oil in a non-stick skillet over medium heat. Add the chicken and cook for 5 to 6 minutes per side until the crust is golden brown and the internal temperature reaches 165 degrees Fahrenheit.
While the chicken is cooking, warm the marinara sauce in a small saucepan over low heat.
Spiralize the zucchini into noodles. Once the chicken is removed from the skillet, add the zucchini noodles to the same pan and sauté for 2 minutes until just tender.
Serve the crispy chicken over the zucchini noodles and warm marinara, garnished with freshly chopped basil.