Peel the potatoes and carrots, cut into pieces, cook in a little salted water until soft and drain. Process with milk and butter to a puree that should not be too fine.
Fry the bacon until crispy brown and add to the puree.
Season about 4 tablespoons of sugar with 5-6 tablespoons of vinegar. Salt as needed.
We eat it as a main course with small grilled sausages.
As a side dish, reduce the amount of ingredients accordingly.