Preheat your oven to 425°F and line a baking sheet with parchment paper for easy cleanup.
Place the chicken breast between two sheets of parchment paper and pound to an even 1/2-inch thickness.
In a shallow bowl, whisk the egg whites until they are slightly frothy and aerated.
In a separate shallow dish, combine the almond flour, grated parmesan, garlic powder, oregano, sea salt, and black pepper.
Dip the chicken breast into the egg whites, allowing any excess to drip off, then dredge in the almond flour mixture, pressing firmly to adhere.
Place the breaded chicken on the prepared baking sheet and drizzle evenly with the extra virgin olive oil.
Bake for 12 minutes, flipping the chicken halfway through, until the coating is golden and the chicken is nearly cooked through.
Remove from the oven and spoon the marinara sauce over the center of the chicken, then sprinkle with the shredded mozzarella.
Return the chicken to the oven for an additional 3 to 5 minutes until the cheese is bubbly and melted.
Garnish with fresh basil leaves and serve immediately while the crust is crispy.