corned beef hash.
http://www.telegraph.co.uk/foodanddrink/recipes/8538952/Corned-beef-hash-recipe.html
Sooooo cheap and easy, with good results usually. You don't need the worcester sauce, and you sometimes want it with an egg.
Basically, get some corned beef and diced potatoes (usually onions too), and you can pretty much add whatever for taste. baked beans, an egg, cheese, ketchup (tinned tomatoes would be nicer come to think of it) etc.