Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper for easy cleanup.
Place the chicken breast between two sheets of plastic wrap and pound gently to an even half-inch thickness.
Season both sides of the chicken breast evenly with the sea salt, black pepper, garlic powder, and dried oregano.
In a shallow dish, whisk together the almond flour and grated parmesan cheese until well combined.
Press the seasoned chicken firmly into the almond-parmesan mixture until it is thoroughly coated on all sides.
Transfer the chicken to the prepared baking sheet, drizzle with olive oil, and bake for 15 minutes.
Remove from the oven, spoon the marinara sauce over the top, and sprinkle with the shredded mozzarella cheese.
Return to the oven for another 5 minutes, or until the cheese is melted, bubbly, and slightly golden.
Let the chicken rest for 2 minutes before garnishing with thinly sliced fresh basil and serving.