Preheat a grill.
Coat each fillet of fish with a thick layer of Dijon mustard. Dip each fillet in bread crumbs and season with salt and pepper.
Brush a hot grill with the oil, and place each fillet on the grill. Grill for approximately 5 minutes, flip, and grill other side until done.
To serve, place on plate and serve with potatoes, broccoli, or any of your favorite vegetables.