01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly oil it.
02 - Pat chicken breasts dry with paper towels. Season both sides generously with salt, black pepper, and garlic powder.
03 - In a shallow bowl, whisk the egg until blended. In another bowl, combine almond flour or breadcrumbs, Parmesan cheese, and Italian herbs.
04 - Dip each chicken breast in the egg, allowing excess to drip off, then dredge in the almond flour mixture, pressing gently to adhere evenly.
05 - Place coated chicken breasts on the prepared baking sheet. Bake for 20 minutes until golden and cooked through.
06 - Remove chicken from oven. Spoon marinara sauce evenly over each breast, then top with mozzarella and additional Parmesan cheese.
07 - Return to oven and bake for 8-10 minutes more until cheese is melted and bubbly and chicken reaches internal temperature of 165°F.
08 - While chicken finishes baking, heat olive oil in large skillet over medium heat. Add zucchini noodles and sauté for 2-3 minutes until just tender. Season with salt and pepper.
09 - Divide zucchini noodles among serving plates. Top each with a piece of baked chicken parmesan. Garnish with fresh basil leaves and serve immediately.