We eat Bubble and Squeak in Newfoundland, too.Bubble and squeak is my favourite meal of the year and one which traditionally is easten on Boxing Day, so Saturday I shall be having it. Left over swede/roast potatoes/cabbage or brussel sprouts etc freid up in lard until it has a crispy slightly burned outter crust and then consumed with cold ham, left over turket and pickles of all kinds, but in our house in particular pickled walnuts. Now I am drooling.
Sometimes we just especially "create" left over veg so we can make bubble and squeak.
It is called that because it bubbles in the pan and then, well let's just say it is said to produce internal gas which may make a squeaking sound on exiting.