Preheat your oven to 400°F and line a baking sheet with parchment paper.
Place the chicken breast between two pieces of plastic wrap and pound to an even half-inch thickness for uniform cooking.
In a shallow bowl, whisk the egg until smooth; in a separate bowl, combine the almond flour, parmesan, garlic powder, oregano, salt, and pepper.
Dip the chicken breast into the egg wash, allowing any excess to drip off, then press firmly into the almond flour mixture until fully coated.
Heat the olive oil in a skillet over medium-high heat and sear the chicken for 2 minutes per side until the crust is golden brown.
Transfer the seared chicken to the prepared baking sheet, top with marinara sauce and mozzarella, and bake for 10-12 minutes until the chicken is cooked through.
While the chicken is baking, spiralize the zucchini and sauté the noodles in the remaining skillet juices for 2-3 minutes until just tender.
Plate the zucchini noodles and top with the crispy chicken parmesan to serve immediately.