But Sedayne has also reminded me of "Scroggin", a mixture of oatmeal (as rolled oats), various dried fruits, various nuts and chocolate.
Before the onset of muesli bars and other, similar, nonsenses Scroggin was made up and used by bushwalkers in Oz as a way of taking snacks without having to drop packs; you kept a bag of it in your parka pocket and ust dipped a hand in while walking. You could add water and boil it up with some powdered milk for breakfast and call it porridge, or add water and boil it up with some rum/whisky/liquer after dinner and call it dessert.
There's a book on the history of bushwalking in Victoria called "The Scroggin Eaters".