Position a rack in the middle of the oven and preheat to 350 degrees. In a small bowl, combine the breadcrumbs, parmesan cheese, herb, salt and pepper. Grease a small sheet pan with a thin coating of oil.
Pat the chicken dry and transfer to the sheet pan. Use a butter knife, offset spatula or your fingers to spread a layer of mustard over the top of the chicken breast. Sprinkle the breadcrumb mixture over, pressing it down so it adheres.
Bake for 25 minutes, or until the chicken registers 165 degrees on an instant-read thermometer. Serve warm.
