Butterfly the chicken breast to ensure even cooking and season both sides with sea salt, black pepper, and garlic powder.
In a shallow bowl, whisk the egg. In another bowl, combine almond flour, grated parmesan, and dried oregano.
Dip the chicken into the egg wash, then coat thoroughly in the parmesan mixture, pressing firmly to adhere.
Heat olive oil in a skillet over medium heat and sear the chicken for 5-6 minutes per side until the crust is golden and crispy.
While chicken cooks, warm the marinara sauce in a small saucepan over low heat.
Flash-sauté the zucchini noodles in the same skillet as the chicken for 1-2 minutes until just tender.
Plate the zucchini noodles, top with the crispy chicken, and finish with a generous pour of warm marinara.