Preheat oven to 375 degrees.
In a small bowl mix together 1 tablespoon olive oil, mustard, honey, and pinch of salt and pepper.
In another small bowl mix together panko bread crumbs, walnuts, the other tablespoon of olive oil, and another pinch of salt and pepper.
Spray a sheet pan with cooking spray.
Lay the chicken breasts on the sheet pan and brush each chicken breast (both sides) with the honey mustard marinade.
Press the breadcrumb mixture on top of each chicken breast.
Bake for 40 minutes or until the chicken reaches 165 degrees Fahrenheit and the juices run clear.
Set the oven to broil. Broil for 1-2 minutes or until the breadcrumb coating is brown and crisp.
Serve hot.