Preheat your oven to 400°F and line a small baking sheet with parchment paper.
In a shallow bowl, whisk the egg. In a second shallow bowl, combine the almond flour, 1 tablespoon of parmesan cheese, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the whisked egg, then dredge it through the almond flour mixture, pressing firmly to ensure an even, crunchy coating.
Heat the olive oil in a non-stick oven-safe skillet over medium-high heat and sear the chicken for 2-3 minutes per side until golden brown.
Spread the marinara sauce over the chicken and sprinkle with the remaining tablespoon of parmesan cheese.
Transfer the skillet to the oven and bake for 10-12 minutes until the chicken is cooked through and the cheese is bubbly.
While the chicken bakes, use a spiralizer to create zucchini noodles and sauté them in a separate pan for 2 minutes until just tender.
Serve the crispy chicken parmesan over the warm zucchini noodles immediately.