Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Season the chicken breast evenly on both sides with sea salt, black pepper, and dried oregano.
In a shallow bowl, whisk the egg until smooth; in a second bowl, combine the almond flour and grated parmesan cheese.
Dip the seasoned chicken into the egg wash, then press into the almond flour mixture until fully and evenly coated.
Heat olive oil in a large skillet over medium-high heat and sear the chicken for 2-3 minutes per side until the crust is golden brown.
Place the seared chicken on the prepared baking sheet, top with marinara sauce and mozzarella cheese, and bake for 10-12 minutes until the chicken is cooked through.
While the chicken bakes, lightly sauté the zucchini noodles in the remaining skillet juices for 2 minutes until just tender.
Serve the crispy chicken parmesan immediately over the warm zucchini noodles.