Peel the beetroot and slice finely. Mix grenadine, vinegar, salt and pepper. Whip the oil into the mixture. Pour vinaigrette over the beetroot slices and leave to stand for approx. 1 hour.
Clean the rocket, wash and pat dry. Remove the pomegranate seeds from the skin. Arrange rocket in portions on plates. Drain the beetroot slices and arrange on the rocket. Sprinkle with remaining vinaigrette and sprinkle with pomegranate seeds.