Leave Mr subedi alone,
   I might have hint of what happened in his head. He was brainstorming words to describe how awesome Nepali food is and then slowly images of food started floating in his head and all he could muster was "Rice", "Rice","Rice".

 He might have not understood what cuisine means but he definitely understood what food meant. It is just that he was thinking to put it more eloquently. If you think about it, he was perfectly right, Nepali cuisine typically means "Rice","Rice","Rice" as an average Nepali consumes it twice a day.