Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Pound the chicken breast to a uniform 1/2-inch thickness using a meat mallet to ensure it cooks evenly and stays tender.
Whisk the egg in one shallow dish, and in another, mix the almond flour, parmesan, garlic powder, oregano, salt, and pepper.
Dredge the chicken in the egg wash, then coat thoroughly in the almond flour mixture, pressing it in firmly to create a solid crust.
Place the chicken on the baking sheet and bake for 15 minutes until the coating starts to turn golden brown.
While the chicken cooks, spiralize the zucchini into noodles and pat them dry with a paper towel to prevent any sogginess.
Spoon the marinara over the chicken and top with shredded mozzarella; bake for another 5-7 minutes until the cheese is melted and bubbly.
Quickly sauté the zucchini noodles in a pan with the olive oil for 2 minutes over medium heat, just until they are slightly softened.
Serve the crispy chicken immediately over the warm zucchini noodles for a clean, satisfying, and high-protein meal.