Preheat oven to 400°F and line a baking sheet with parchment paper.
In a shallow bowl, whisk the egg; in another bowl, combine almond flour, parmesan, salt, pepper, and garlic powder.
Dip the chicken breast into the egg wash, then coat thoroughly with the parmesan mixture.
Heat olive oil in a skillet over medium heat and sear the chicken for 2 minutes per side until golden.
Transfer chicken to the baking sheet and bake for 10-12 minutes until cooked through.
While chicken bakes, spiralize the zucchini and sauté in the same skillet for 3 minutes until tender.
Warm the marinara sauce in a small saucepan over low heat.
Plate the zucchini noodles, top with marinara, and place the crispy chicken on top, garnishing with fresh basil.