Preheat oven to 400°F and line a baking sheet with parchment paper.
Butterfly the chicken breast and pound to an even thickness for uniform cooking.
In a shallow bowl, whisk the egg; in another bowl, combine almond flour, parmesan, oregano, garlic powder, salt, and pepper.
Dip chicken into the egg wash, then press firmly into the almond flour mixture until fully coated.
Heat olive oil in a skillet over medium heat and sear the chicken for 2 minutes per side until golden brown.
Transfer chicken to the baking sheet, top with marinara and mozzarella, and bake for 10-12 minutes.
While chicken bakes, lightly sauté zucchini noodles in the same skillet for 2-3 minutes until just tender.
Serve the crispy chicken over the noodles and garnish with fresh basil.