Preheat oven to 325 degrees F.
Using a shallow glass dish, combine the oil, bourbon, and salad dressing mix. Place the beef in the dish and coat with the marinade mixture. Cover and refrigerate overnight.
Remove the meat from the marinade and blot it dry using a paper towel. Salt the meat and coat it heavily in black pepper. Place meat in oven and roast until a meat thermometer registers your desired doneness. Allow beef to cool, slice thinly, and serve.
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