Prepare a shallow bowl and combine the almond flour, grated Parmesan cheese, garlic powder, dried oregano, dried basil, salt, and pepper.
In another bowl, whisk the eggs until well combined.
Dip each chicken breast into the egg mixture, allowing the excess to drip off, then coat thoroughly in the almond flour mixture.
In a large skillet, heat olive oil over medium heat. Once hot, add the coated chicken breasts and cook for about 4-5 minutes per side, or until golden brown.
Transfer the cooked chicken to a baking dish.
Spoon marinara sauce over each chicken breast, then top each with shredded mozzarella cheese.
Bake in the preheated oven for 20-25 minutes, or until the cheese is melted and bubbly, and the chicken is cooked through (internal temperature should reach 165°F or 75°C).
Remove from the oven and let it cool for a few minutes. Garnish with fresh basil leaves before serving.