Preheat your oven to 400°F and prepare an oven-safe skillet or baking dish.
In a shallow bowl, whisk the egg until smooth. In a second shallow bowl, combine the almond flour, grated parmesan, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, allowing any excess to drip off, then dredge it through the almond flour mixture, pressing firmly so the coating adheres to all sides.
Heat the olive oil in an oven-safe skillet over medium-high heat. Once hot, sear the chicken for 2-3 minutes per side until the crust is golden brown and crispy.
Remove the skillet from the heat. Spoon the marinara sauce over the center of the chicken breast and sprinkle with the shredded mozzarella cheese.
Place the skillet directly into the oven and bake for 10-12 minutes, or until the chicken reaches an internal temperature of 165°F and the cheese is bubbly.
While the chicken is finishing, lightly sauté the zucchini noodles in a separate pan over medium heat for 2 minutes until just tender, then drain any excess liquid.
Plate the zucchini noodles, top with the crispy parmesan chicken, and garnish with freshly chopped basil.