Grilled Roast Beef & Cheese With Cola Caramelized Onions

I hit the jackpot with this sandwich! Out of this world good! My family loved it! We love deli roast beef and we like it medium to a little rare, add the provolone cheese, topped with the cola caramelized onions and you have one awesome sandwich! All I can say is, dinner was fantastic! I will be making these time and time again! I made 4 sandwiches so I used more bread, roast beef and cheese but I kept the recipe for the onions as is and it was plenty of onions! The best onions I've ever eaten and if you've never caramelized onions with these ingredients, I highly recommend it! Delish! This recipe came from Tasty Kitchen which The Pioneer Woman created for everyone to share their recipes so if you want to see a great site for recipes, check it out with the link I provided!