Take vacuum-packed beets out of the packaging and allow to drain. Peel the onions. Grate the beetroot and onions in a bowl. Use gloves for this. Alternatively, chop very finely.
Season the salad with oil, vinegar, salt and pepper. Add sugar to taste. Stir well and let steep for half an hour.
Goes particularly well as an accompaniment to dumplings, potatoes and meat dishes.