Put a pan of salted water on to boil. Add the unpeeled potatoes and boil, covered, for about 20 minutes, or until they are soft and completely cooked through.
Drain the potatoes and, when they are cool enough, peel them. Mash them well in a wide bowl. Add the mince, parmesan, egg and salt and mix thoroughly with your hands.
Roll into balls about the size of small walnuts and then flatten them a bit into little ovals. Put the breadcrumbs on a plate and pat the croquettes in them to coat both sides. Drizzle about
Put the tray in the oven and
Serve warm or at room temperature with a small scattering of salt, if you think they need it.