Peel and wash the potatoes and cut into large cubes. Cook in little boiling salted water for about 20 minutes. Drain the potatoes and press them into a bowl with a potato ricer. Add milk, bowl and truffle butter and mix.
Season to taste with salt and pepper. In a hot pan without fat, fry the salsicce briefly on both sides. Drain on kitchen paper. Arrange the puree on a small plate and arrange salsicce on top.
Sprinkle with balsamic cream.