Preheat the oven to 450 degrees F (232 degrees C).
Pat the chicken breast dry and season them with a little salt and pepper to taste.
Dip each piece of chicken into the flour, shake off the excess flour, and set aside.
Whisk together the eggs until smooth. In a separate bowl, mix together the breadcrumbs and ½ cup parmesan cheese until combined (reserve the other ¼ cup of parmesan cheese to sprinkle on top).
Dip each floured piece of chicken breast into the egg mixture and shake off any excess. Immediately dip the egg-coated chicken into the breadcrumb cheese mixture, making sure to firmly pat the breadcrumbs into the chicken so that they stick. Repeat with each piece and set them aside. Let the chicken sit and rest for 10 minutes.
As the coated chicken pieces are resting, heat a pan with oil on medium heat. Once the oil is hot, add the chicken breast pieces and pan-fry them for a few minutes per side. This is mainly to obtain the golden brown color and the chicken will continue to cook in the oven.
Once each side is golden brown, transfer the chicken pieces to a pan and layer each piece with a few tablespoons of marinara sauce, a few tablespoons of mozzarella cheese, and a few teaspoons of grated Parmesan cheese. If you'd like, sprinkle a little Italian seasoning on top of the cheese.
Bake the breasts for 8-10 minutes, or until the cheese is fully melted and bubbly.