Preheat your oven to 375°F (190°C).
In a bowl, combine the almond flour, grated Parmesan cheese, melted butter, minced garlic, dried basil, dried oregano, salt, and pepper. Mix well to create a crumbly topping.
Place the chicken pieces in a greased casserole dish.
Pour the marinara sauce evenly over the chicken.
Sprinkle the shredded mozzarella cheese over the marinara sauce.
Spread the crumbly topping mixture evenly over the cheese.
Cover the casserole dish with foil and bake in the preheated oven for 25 minutes.
Remove the foil and continue baking for an additional 10 minutes, or until the chicken is cooked through and the topping is golden and crispy.
Garnish with fresh basil leaves before serving.