THEY should be boiled in a great deal of water, and when you find they are soft (which you will know by running a fork into them) take them up, and carefully scrape all the dirt off them; and then with a knife scrape them all fine, throwing away all the sticky parts; then put them into a sauce-pan with some milk, and stir them over the fire till they are thick. Take care they don't burn, and add a good piece of butter, and a little salt, and when the butter is melted send them to table.