For the puree, wash the potatoes and cook in salted water for about 25 minutes. Drain, let cool a little.
Put the cream, butter and spices in a saucepan and heat. Peel the potatoes and press them through the potato press into the warm cream butter, if the puree is too thick, stir in a little more milk. Season to taste and keep warm.
For the herb crumbs, peel the onion and cut into cubes. Heat the butter in a pan and roast the onions in it. Finely chop the herbs, stir in, stir in breadcrumbs and season the mixture with salt and pepper.