Preheat oven to 400 degrees F
Spray a baking dish with cooking spray or lightly grease.
In a small bowl, combine panko bread crumbs, rosemary, thyme, oil, salt and pepper and mix thoroughly.
Pat the pork tenderloin dry with paper towels.
On a piece of plastic wrap, spread half of the bread crumbs mixture in a strip as long as the tenderloin.
Coat one side of the meat with 1 tablespoon of mustard.
Set the mustard side of the tenderloin down on the breadcrumb mixture to stick to the mustard.
Coat the other side of the meat with another tablespoon of mustard and roll over to coat this side with the remaining breadcrumb mixture.
Place the tenderloin in baking dish
Roast for approximately 35-45 minutes or until the center is barely pink and has an internal temperature of 155 degrees F.
Let stand for 5 minutes before slicing.