Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness.
In a shallow bowl, whisk the egg. In a second shallow bowl, combine the almond flour, grated parmesan, sea salt, black pepper, and garlic powder.
Dip the chicken breast into the egg wash, then dredge in the almond flour mixture, pressing firmly to ensure an even coating.
Heat the olive oil in a non-stick skillet over medium heat. Cook the chicken for 4-5 minutes per side until golden brown and cooked through.
Preheat your broiler. Spread the marinara sauce over the chicken and top with the shredded mozzarella.
Place the skillet under the broiler for 1-2 minutes until the cheese is melted and bubbly.
In a separate pan, briefly sauté the zucchini noodles for 2 minutes until just tender, then season lightly with salt.
Serve the crispy chicken over the zucchini noodles and garnish with freshly chopped basil.