Sprinkle both sides of your chicken breasts Italian seasoning, salt and pepper. Place your grated parmesan on a shallow dish. In another shallow dish beat the egg.
In a large saute pan, heat the oil over medium heat until hot. Dip each piece of chicken in the egg so that it's fully covered and then dip it in the breading so that it is fully covered.
Fry the chicken in the hot oil for 3 minutes on each side or until a nice golden grown. Don't worry about whether or not the chicken is fully cooked as it will finish cooking in the oven. Once done, place the chicken on plate lined with paper towels.
Spread ½ cup of the marinara sauce on the bottom of a casserole dish. Place the chicken in the dish and then spread the remaining marinara sauce evenly on top of the chicken. Place the shredded mozzarella on top of the chicken and bake for 20 minutes until it’s a nice golden brown. Garnish with fresh herbs and serve hot.