Preheat your oven to 400°F and line a baking sheet with parchment paper.
Whisk the egg in a shallow bowl. In a separate bowl, combine the almond flour, parmesan cheese, garlic powder, onion powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the whisked egg, then coat it thoroughly with the parmesan flour mixture, pressing firmly to ensure the crust adheres.
Place the chicken on the prepared baking sheet and bake for 18-20 minutes until the internal temperature reaches 165°F and the crust is golden.
While the chicken is baking, use a spiralizer or peeler to create zucchini noodles.
Heat the olive oil in a skillet over medium heat and sauté the zucchini noodles for 2-3 minutes until just tender.
Warm the tomato puree in a small saucepan over low heat, adding a pinch of salt and oregano if desired.
Serve the crispy chicken over the zucchini noodles and top with the warm marinara sauce.