Preheat your oven to 450°F. Lightly spray a baking sheet with cooking spray.
Combine breadcrumbs and Parmesan cheese in a shallow dish. Melt butter and brush it onto each chicken breast. Dip the chicken into the breadcrumb mixture, ensuring even coating.
Arrange the coated chicken breasts on the prepared baking sheet. Lightly spray the top with cooking spray.
Bake in the oven for 25 minutes until golden and cooked through.
Remove chicken from oven, spoon marinara sauce over each piece, and top with shredded mozzarella cheese.
Return to the oven and bake for an additional 5 minutes until cheese is melted and bubbly.
Garnish with basil or parsley if desired and serve hot.
Notes
A classic Italian-American dish made healthier by baking instead of frying.