Preheat your oven to 400°F.
Place the chicken breast between two pieces of parchment paper and pound to an even half-inch thickness, then season both sides with sea salt and black pepper.
Set up a breading station with two shallow bowls: whisk the egg in the first bowl, and combine the almond flour, parmesan cheese, garlic powder, and oregano in the second.
Dip the chicken into the egg wash, letting any excess drip off, then press it firmly into the almond flour mixture until fully and evenly coated.
Heat the olive oil in a medium oven-safe skillet over medium-high heat and sear the chicken for 3 minutes per side until the crust is golden brown.
Spread the marinara sauce over the top of the chicken and sprinkle with the shredded mozzarella cheese.
Transfer the skillet to the oven and bake for 10 to 12 minutes, or until the chicken reaches an internal temperature of 165°F and the cheese is bubbly.
While the chicken bakes, use a spiralizer to create zucchini noodles and lightly sauté them in a separate pan for 2 minutes until just tender.
Plate the crispy chicken over the zucchini noodles and garnish with freshly chopped basil.