Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Spiralize the zucchini into thin noodles and place them on a paper towel to drain any excess moisture.
In a shallow bowl, whisk the egg white until slightly frothy; in a second bowl, mix the almond flour, oregano, garlic powder, salt, and pepper.
Dip the chicken breast into the egg white, then dredge it through the almond flour mixture, pressing firmly to ensure an even coating.
Heat the olive oil in an oven-safe skillet over medium-high heat and sear the chicken for 2-3 minutes per side until the crust is golden brown.
Spread the marinara sauce over the chicken and top with the mozzarella cheese.
Transfer the skillet to the oven and bake for 10-12 minutes 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 non-stick pan for 2 minutes just to soften.
Plate the zucchini noodles, place the chicken on top, and garnish with parmesan cheese and fresh basil.