From "The Galt Cookbook", published in 1898. I have adapted it slightly, by adding quantities and instructions. To my complete surprise these remind me a little of "Lo Bak Go", (Dim Sum popular at Chinese new years.) The good ladies of Galt are no doubt rolling in their graves, but I serve these with a good whack of chile-garlic sauce 'cause that's how I like my Lo Bak Go too. These are not the sort of thing to make from scratch, but from the leftovers of a ham-and-potato meal. They are easiest to mix if the potatoes are still warm, so set them on to poach as you clean up after dinner. Then, they can be fried up when you want them. Keep cakes wrapped in the fridge until ready to fry. They will keep for a couple days, so you don't have to fry all of them at once. I should also note that I use an unsalted smoked ham, so you may wish to reduce or eliminate the salt if your ham is salted.