Thaw roast thoroughly, will take 2 days in refrigerator.
Oven: Preheat oven to 425°F. (The high heat is needed to develop a brown exterior). Season thawed chateaubriand roast with cracked pepper and salt or Omaha Steaks Seasoning (#1141). Place roast on broiling pan or in a roasting pan, roast uncovered in oven for 50-55 minutes or until internal temperature reached 130 degrees for medium rare. Remove from oven. Let beef tenderloin roast rest for 15 minutes for internal temperature to rise. Serves 8-12.
Grilling: Preheat grill (high heat for gas grill; prepare briquettes for charcoal grill). Season thawed chateaubriand roast with cracked pepper and salt or Omaha Steaks Seasoning (#1141). Place roast on grill and sear on high for 6 minutes, turn roast every 4 to 6 minutes until all sides are seared. Reduce grill heat to medium, continue grilling another 20-30 minutes until desired degree of doneness is reached. Total cooking time will be 40-50 minutes. Putting the roast on a broiler pan will allow the juices to fall into the drip pan and thus will eliminate most splattering and smoking.