This recipe for oven-baked 7-bone pot roast and vegetables gets a boost from cola which creates an incredibly rich gravy. You won't taste cola, but the gravy is to die for You can substitute any brand of plain cola, but do not use diet soda. This recipe also will work well with other chuck roasts if you are unable to find a 7-bone roast. Directions also are given to prepare the roast in a slow cooker.