Preheat oven to 425 degrees
Melt 4 Tbsp of butter in a medium to large pan
Place chicken breasts into Ziplock bags, (I usually do 2-3 breasts per bag depending on the size) and tenderize until thin and even
Dip each chicken breast first into the melted butter and then into the breadcrumbs, coating them lightly
Sprinkle shredded parmesan onto each breaded chicken breast
Place the breaded chicken breasts onto the pan and cook for approximately 18 mins
Remove the chicken breasts from oven and add a spoonful or two of marinara sauce as well as one slice of mozzarella cheese to each
Set oven to broil and place chicken breasts back into the oven for a minute or two. Keep an eye on them and remove when cheese is melted.
Remove from oven, plate with your favorite vegetable or salad and enjoy!