What is the speciality dish called "Chicken Butterfly" at Nando's and what makes it unique compared to other menu items?

The specialty dish "Chicken Butterfly" at Nando's is a butterflied chicken breast that is flame-grilled and served with a choice of peri-peri sauce. What makes it unique compared to other menu items is its tender and juicy texture, as well as the customizable level of spiciness with the peri-peri sauce.