Preheat the oven to 400°F (200°C) and pound the chicken breast to an even half-inch thickness.
Whisk the egg in a shallow bowl until smooth.
In a separate bowl, combine the almond flour, parmesan cheese, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, then press it firmly into the almond flour mixture to coat both sides.
Heat the olive oil in a large oven-safe skillet over medium-high heat.
Sear the chicken for 3 to 4 minutes per side until the crust is golden brown.
Spoon the marinara sauce over the chicken and top with the mozzarella cheese.
Place the skillet in the oven for 5 to 7 minutes until the cheese is melted and bubbly.
Serve the chicken immediately over the fresh zucchini noodles.