The beets need to be prepared 8 hours before serving so that they have time to absorb the flavours of the dressing. Use freshly boiled beets & slice them thinly into a bowl. Crush the caraway seeds & pour the water over the top. Leave them to sit until the water has become cold. Strain. Mix the strained liquid with the vinegar, sugar & salt. Pour over the sliced beets. Leave to stand for 8 hours. Before serving, sprinkle with caraway seeds if desired.