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, oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the egg wash, then press it firmly into the almond flour mixture until it is evenly coated on all sides.
Place the breaded chicken on the prepared baking sheet and bake for 15-18 minutes, or until the crust is golden and the chicken is cooked through.
Remove from the oven and spoon the marinara sauce over the center of the chicken, then sprinkle the mozzarella cheese on top.
Return the pan to the oven and broil for 2-3 minutes until the cheese is melted, bubbly, and slightly browned.
Garnish with freshly chopped basil and serve immediately.