Preheat your oven to 400°F and lightly grease a baking sheet with the olive oil.
In a shallow bowl, whisk the egg until smooth. In a second bowl, combine the almond flour, parmesan cheese, garlic powder, oregano, sea salt, and black pepper.
Dredge the chicken breast in the egg wash, then press it firmly into the almond flour mixture until evenly coated on all sides.
Place the chicken on the prepared baking sheet and bake for 15 minutes.
Remove the tray from the oven, spoon the marinara sauce over the chicken, and sprinkle with the shredded mozzarella.
Return to the oven and bake for another 5 to 7 minutes until the cheese is melted and the chicken is cooked through.
Garnish with chopped fresh basil and serve immediately.