Cut tenderloin lengthwise to within 12 inch of opposite edge leaving edge intact
Open tenderloin out flat
Place heavy-duty plastic wrap on tenderloin pound meat to flatten
Remove wrap Spread mustard sprinkle sage green peppercorns and 12 tablespoon each of black and white ground peppercorns
Fold tenderloin back over and tie with string at 3-inch intervals Spread butter on top of tenderloin sprinkle rest of peppercorns Place on rack
Can bake at 425 for 30 to 45 minutes or until meat thermometer inserted at thickest part of meat reads 140 for rare 150 for medium or 160 for well done