Preheat oven to 400°F and line a baking sheet with parchment paper.
Pound the chicken breast to an even half-inch thickness to ensure uniform cooking.
In a shallow bowl, whisk the egg. In a second bowl, combine almond flour, parmesan, oregano, garlic powder, salt, and pepper.
Dip the chicken into the egg wash, then press firmly into the almond flour mixture until fully coated.
Place chicken on the baking sheet and bake for 15-18 minutes until the crust is crisp and golden.
Spoon marinara sauce over the chicken and sprinkle with mozzarella cheese.
Return to the oven for 3-5 minutes or until the cheese is bubbly and melted.
Garnish with fresh basil before serving.