Amazing beef short rib sandwiches filled with caramelized sweet onions and melted cheese on toasted ciabatta bread. This easy recipe is the best way to use up leftover BBQ ribs.
This roast beef sandwich recipe serves succulent slices of roast beef on toasted ciabatta for a meaty barbecue sandwich that’s out of this world. Topped with melted cheese, caramelized onions, and horseradish mustard dressing, there’s flavor in every bite of this sandwich.
This easy sandwich is our favorite leftover rib recipe and it’s easy to see why. You’re left with leftover smoked ribs while YOU keep their juicy, tender texture in tact, for the ultimate steak sandwich.
Find out the best way to reheat beef for this sandwich, plus amazing filling ideas and cooking tips. Let’s go to the corner.
Main ingredients
How to make this easy steak sandwich:
- Beef Short Rib Roast – We use leftovers from our Succulent Smoked Short Rib by reheating it whole in the oven before thinly slicing to serve.
- Toasted Ciabatta Bread – Italian ciabatta has the perfect balance of crispy crust and doughy interior that we want in our barbecue sandwich. We toast it to give it an even more satisfying texture.
- Finely Sliced Provolone Cheese: To keep with the Italian theme, Provolone is a creamy Italian cheese that melts beautifully when sliced. Monterey Jack, Fontina, and Mozzarella cheese are good substitutes for Provolone if you need an alternative.
- Caramelized Onions: Slowly roasted onions make everything better. Cook them slowly in oil and salt at a lower temperature until golden brown to add an incredibly sweet touch to your sandwich.
- Horseradish Mustard: While horseradish or mayonnaise are perfect ingredients for this recipe, I prefer a bit more zing with yellow or Dijon mustard. However, horseradish mustard combines all of the above in one condiment. You can make your own or buy a store-bought version online like Annie’s Horseradish Mustard .
Writer & content creator. BBQ fanatic!