Not sure what to do with your leftover Prime Rib? This recipe transforms the meat in the fridge into luscious, cheesy tacos in a matter of minutes. Since the meat is already cooked, making this dish is a breeze. Just heat up the prime rib, pile it on a tortilla and top it with creamy horseradish to create these rich and savory handheld treats.This recipe was created by our partner, Dave X of @daves_fire_foods. Dave made this recipe on the Char‑Broil® 3-Burner Gas Griddle, but you can make it on your own grill.