Preheat your oven to 400°F and line a baking sheet with parchment paper.
Spiralize the zucchini into thin noodles and set them aside on a paper towel to drain excess moisture.
In a shallow bowl, whisk the egg until smooth. In a separate bowl, combine the parmesan cheese, almond flour, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, then coat it thoroughly with the parmesan-almond mixture, pressing firmly to ensure the crust adheres.
Heat the olive oil in an oven-safe skillet over medium-high heat and sear the chicken for 2-3 minutes per side until a golden crust forms.
Transfer the skillet to the oven and bake for 10-12 minutes, or until the chicken reaches an internal temperature of 165°F.
While the chicken is baking, warm the marinara sauce in a small saucepan over low heat.
Flash-sauté the zucchini noodles in a separate pan for 2 minutes until just tender but not mushy.
Plate the zucchini noodles, top with the crispy chicken breast, and finish with a generous pour of the warm marinara sauce.