Meat, onion and potato dish (5,4)
I believe the answer is:
irish stew
(Other definitions for irish stew that I've seen before include "food" , "Mutton and vegetable dish" , "National dish, boiled mutton, spuds and onions" , "National dish of potatoes, mutton and onions simmered in water" , "Dish of meat, onions, potatoes etc" .)