Made this last week as a quick supper dish - really good but needs more corned beef.
1 tin corned beef
5 big baking potatoes chopped, boiled, mashed but not too soft
2 onions fried until soft and caramelly
good glug worcestershire sauce
heaped tspn whole grain mustard
salt and pepper
Once potato has cooled simply stir in everything else ( don't break up corned beef too much ) and bake in a hot oven for about 30 mins. Once golden brown serve with anything, I like salad but everyone else likes beans!
Next time I am going to put in 2 tins of corned beef, yummy but not corned beefy enough