Preheat oven to 425 degrees F.
Lightly grease a large baking dish with cooking spray and set aside. If desired, for extra crispiness to bake the chicken you can place a cooling rack inside a baking dish.
In a large shallow bowl, combine all the "Chicken Crust" ingredients.
In another bowl, whisk the egg and buttermilk.
Place chicken cutlets on a cutting board and using a flat meat mallet or rolling pin, pound it to flatten it.
Take each chicken cutlet and dip it into the egg mixture, shake to drain and roll it into the bread crumbs mixture. Cover it very well in bread crumbs. Place the chicken into the prepared baking dish (or onto the cooling rack).
Spray the top of each chicken cutlet with vegetable oil spray and bake it in the oven for 15-20 minutes, it should look golden brown and crispy.
Top each chicken cutlet with a few tablespoons of marinara sauce, add the rest to the baking dish. Top each cutlet with some shredded mozzarella cheese.
Return to the oven and bake for another 5-10 minutes, until the cheese is melted.
Garnish with freshly chopped parsley and serve.