Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Pound the chicken breast between two pieces of plastic wrap to an even half-inch thickness and pat dry.
In a shallow bowl, lightly whisk the egg white until frothy.
In a separate shallow dish, combine the almond flour, grated parmesan, oregano, garlic powder, salt, and pepper.
Dip the chicken breast into the egg white, then press firmly into the almond mixture to coat both sides thoroughly.
Place the breaded chicken on the prepared baking sheet and bake for 15 minutes until the crust is crisp and golden.
Remove from the oven, spoon the marinara sauce over the chicken, and sprinkle with the shredded mozzarella.
Return the chicken to the oven for 3 to 5 minutes until the cheese is melted and bubbly.
While the chicken finishes, sauté the zucchini noodles in a large skillet with olive oil over medium heat for 2 minutes until just tender.
Plate the zucchini noodles and top with the crispy chicken parmesan, garnishing with fresh basil if desired.