Place croutons in a food processor and pulse until you reach a bread crumb consistency.
Combine croutons, panko, and parmesan in a shallow dish (I like to use a pie plate), and stir to combine.
In another shallow dish, add eggs and whisk.
Preheat a skillet on medium heat and add enough olive oil to coat the bottom of the pan.
Take each chicken breast and dip in the eggs first being sure to fully coat both sides.
Then dip the chicken in the crouton mixture, being sure to cover the entire piece.
Place the chicken in the heated skilled and cook until browned (about 2-3 minutes each side).
Cook one piece at a time to avoid over crowding and bringing the oil temperature down.
Remove each piece and place on a paper towel lined plate.
Once completed, add 2 tablespoons of marinara sauce to the top of each piece followed by 2 tbsp of mozzarella.
Either place back in the skillet with a lid and heat until the cheese is melted, or pop into a casserole dish and under the broiler for a minute or so until it's bubbly and melted.
Serve it up over a big pile of buttered pasta! Enjoy!