Preheat the oven to 375°F (190°C).

Place each chicken breast between two pieces of plastic wrap and pound to 1-inch thickness.

In a shallow bowl, whisk together the eggs with a pinch of salt and pepper; in another bowl, combine breadcrumbs, Parmesan cheese, Italian seasoning, salt, and pepper.

Dip each chicken breast into the egg mixture, letting excess drip off, then coat with the breadcrumb mixture, pressing gently to adhere.

Heat about 2 tablespoons of olive oil in a frying pan over medium heat; fry the chicken for 4–5 minutes per side until golden brown.

Spread 1 cup of marinara sauce in a large baking dish; place fried chicken breasts on top and spoon remaining sauce over them.

Sprinkle 1 1/2 cups of shredded mozzarella cheese evenly over the chicken and sauce.

Cover the baking dish with aluminum foil and bake for 20 minutes.

Remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and golden.

Let the chicken rest for 5 minutes before serving.