Preheat your oven to 400°F and line a rimmed 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 thoroughly dry with paper towels.
In a shallow bowl, whisk the egg white until it becomes slightly frothy and light.
In a separate shallow dish, combine the almond flour, grated parmesan, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the egg white to coat, then dredge it in the almond flour mixture, pressing firmly so the breading adheres to all sides.
Place the breaded chicken on the prepared baking sheet and bake for 15 minutes until the coating starts to turn golden.
Remove the pan from the oven, spoon the marinara sauce over the chicken, and top with the shredded mozzarella cheese.
Return the chicken to the oven for 5-7 minutes until the cheese is melted and bubbly and the chicken is cooked through.
While the chicken finishes, sauté the zucchini noodles in a pan with the olive oil over medium heat for 2-3 minutes until just tender.
Serve the crispy chicken parmesan immediately over the bed of warm zucchini noodles.