Preheat the oven to 450 degrees. Mix the mustard and olive oil and brush this over the meat. Sprinkle lightly with salt and pepper to taste. Mix together the parsley, garlic, lemon peel and breadcrumbs and set aside in a bowl. Place the meat in a roasting pan. Roast for 10 minutes. Remove the roast and place the parsley mixture evenly over the mustard-coated surface. Return the roast to the oven and continue to roast the meat 15-25 minutes, depending on how well-done you like your meat: A meat thermometer will read 120-125 degrees for rare and 135-140 degrees for medium. Let the roast stand about 10 minutes before you serve it.  Makes 5-6 servings