Wash and boil the potatoes. Peel them and mash them in a large pot with a slotted spoon. Don't mash them finely, you need to have coarse lumps remaining.
Add the butter to the still-warm potatoes and mix. Put the cream in and add spices to taste. These mashed potatoes can be eaten as a side dish or shaped into balls, rolled in eggs and breadcrumbs and then fried.