Preheat your oven to 400°F (200°C).
Pound the chicken breast between parchment paper to an even half-inch thickness to ensure even cooking.
In a shallow bowl, whisk the egg; in a second bowl, combine almond flour, parmesan cheese, sea salt, black pepper, and garlic powder.
Dip the chicken into the egg wash, then press firmly into the almond mixture to coat both sides thoroughly.
Heat olive oil in a medium oven-safe skillet over medium-high heat.
Sear the chicken for 3 minutes per side until the crust is golden brown and crispy.
Pour the marinara sauce over the chicken and top evenly with the mozzarella cheese.
Place the skillet in the oven and bake for 8 to 10 minutes until the chicken is cooked through and the cheese is bubbly.
While the chicken bakes, lightly sauté the zucchini noodles in a separate pan for 2 minutes until just tender.
Serve the crispy chicken parmesan over the bed of zucchini noodles and enjoy immediately.