First things first. In order to make this amazing Cheesy Italian Beef Breakfast Skillet, you must have made a roast beef the evening beforehand. I know, it’s going to be a hardship to do so, but you are going to have to take one for the team here. I guess you could cook a roast beef overnight in your crockpot and then eat it in the morning – hey man, I am not judging anyone, this Alberta girl loves her red meat – and use it in this skillet. That would work as well, especially if you are cooking for a crowd. This skillet was actually just my way of using up some leftover beef from Sunday dinner.